WO2007058351A1 - 樹脂製保持器及び転がり軸受 - Google Patents

樹脂製保持器及び転がり軸受 Download PDF

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Publication number
WO2007058351A1
WO2007058351A1 PCT/JP2006/323133 JP2006323133W WO2007058351A1 WO 2007058351 A1 WO2007058351 A1 WO 2007058351A1 JP 2006323133 W JP2006323133 W JP 2006323133W WO 2007058351 A1 WO2007058351 A1 WO 2007058351A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
crown
pocket
ball bearing
synthetic resin
Prior art date
Application number
PCT/JP2006/323133
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Takiyoshi Yamada
Takahiko Uchiyama
Kenichi Iso
Junji Ono
Masahiro Harunaga
Kinji Yukawa
Makoto Yasuda
Jianjun Zhan
Nariaki Aihara
Original Assignee
Nsk Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nsk Ltd. filed Critical Nsk Ltd.
Priority to CN2006800418853A priority Critical patent/CN101305193B/zh
Priority to JP2007545334A priority patent/JP4766051B2/ja
Priority to EP06832983A priority patent/EP1953400A4/de
Priority to US12/094,101 priority patent/US8303192B2/en
Publication of WO2007058351A1 publication Critical patent/WO2007058351A1/ja

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/418—Details of individual pockets, e.g. shape or ball retaining means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3812—Ball cages formed of interconnected segments, e.g. chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3825—Ball cages formed as a flexible belt, e.g. spacers connected by a thin film
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3831—Ball cages with hybrid structure, i.e. with parts made of distinct materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/3887—Details of individual pockets, e.g. shape or ball retaining means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
    • F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/08—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with two or more rows of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/02—Plastics; Synthetic resins, e.g. rubbers comprising fillers, fibres
    • F16C2208/04—Glass fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/52—Polyphenylene sulphide [PPS]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/60—Polyamides [PA]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2220/00—Shaping
    • F16C2220/02—Shaping by casting
    • F16C2220/04—Shaping by casting by injection-moulding
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/06—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/08—Time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60—Thickness, e.g. thickness of coatings

Definitions

  • the present invention relates to a cage made of resin.
  • the present invention also relates to a rolling bearing provided with a cage made of resin.
  • an object of the present invention is to solve the problems of the prior art as described above, and to provide a resin cage that does not easily deform, generate heat, or wear even when used at a high speed. Another object is to provide a rolling bearing that is less likely to generate heat and wear even when used at high speeds.
  • a rib cage retainer for radial ball bearings according to a first aspect of the present invention comprises a ring-shaped main portion made of resin and a plurality of pockets provided on one end surface in the axial direction of the ring-shaped main portion, An annular reinforcing member extending along the annular main portion concentrically attached to the other axial end surface of the annular main portion. It is characterized by satisfying the following four conditions for a resin-coated crown cage for Al ball bearings.
  • Condition 1 The cross-sectional shape of the reinforcing member in a plane parallel to the axial direction is a rectangle.
  • Condition 2 The reinforcing member is embedded in a recessed portion formed on the other axial end surface of the annular main portion and integrated.
  • Condition 3 Force that is manufactured by insert molding using the reinforcing member as an insert, and the annular main portion and the reinforcing member are integrated together at the time of insert molding, or the annular main portion manufactured by injection molding The reinforcing member is fixed together by an adhesive or press-fitting.
  • F is the radial distance between the outer diameter surface of the annular main portion and the outer diameter surface of the reinforcing member, and the distance between the inner diameter surface of the annular main portion and the inner diameter surface of the reinforcing member.
  • G is a radial distance
  • E is an axial distance between the bottom surface of the pocket and the pocket-side surface of the reinforcing member, and E, F, and G exceed 0, and the outer diameter surface of the reinforcing member,
  • the inner surface and the surface on the pocket side are covered with the annular main portion, and the surface on the side opposite to the pocket is exposed.
  • a rib cage retainer for a radial ball bearing includes a ring-shaped main portion made of resin, and a plurality of pockets provided on one end surface in the axial direction of the ring-shaped main portion,
  • a radial ball bearing resin cage retainer comprising: an annular reinforcing member extending along the annular main portion concentrically attached to the other axial end surface of the annular main portion. It is good also as composition which satisfies.
  • Condition 5 The cross-sectional shape of the reinforcing member in a plane parallel to the axial direction is a rectangle.
  • the reinforcing member is attached to and integrated with the other axial end surface of the annular main portion, and the outer diameter surface, inner diameter surface, and anti-pocket side surface are covered with the annular main portion. It is exposed.
  • Condition 7 Force produced by insert molding using the reinforcing member as an insert, and the annular main portion and the reinforcing member integrally formed at the time of insert molding, or the annular main portion produced by injection molding The reinforcing member is fixed together by an adhesive or press-fitting.
  • Condition 8 The radial distance between the outer diameter surface of the annular main portion and the outer diameter surface of the reinforcing member F, G is the radial distance between the inner diameter surface of the annular main portion and the inner diameter surface of the reinforcing member, and E is the axial distance between the bottom surface of the pocket and the pocket-side surface of the reinforcing member. E, F, and G are 0 or more.
  • E, F, and G are preferably over zero.
  • the surface of the reinforcing member is subjected to shot peening or chemical conversion treatment to form irregularities, and the surface roughness Ra is preferably at least 0.3 m. More preferably.
  • the surface roughness Ra of the surface of the reinforcing member is larger than 6.4 m, it is not preferable because there is a problem that foreign matter (dust) is likely to adhere.
  • the surface of the reinforcing member on the pocket side may be a concave surface.
  • the portion of the reinforcing member on the side opposite to the axial direction in the axial direction has a tapered shape in which the width between the inner diameter surface and the outer diameter surface gradually decreases as the pocket side force is also directed toward the opposite pocket side.
  • the reinforcing member may be manufactured by punching out a metal plate, and in this case, it is preferable that the lower portion in the punching direction is directed toward the pocket. However, it is preferable to remove burrs and the like generated during the manufacture of the reinforcing member.
  • Such a resin-coated crown cage for radial ball bearings according to the first invention is suitable as a cage for an anguilla ball bearing or a double row ball bearing. That is, an anguilla comprising an inner ring, an outer ring, a plurality of rolling elements that are arranged to roll between the inner ring and the outer ring, and a cage that holds the rolling element between the inner ring and the outer ring.
  • the cage is a resin-made crown cage for a radial ball bearing of the first invention.
  • the cage is a resin-made crown cage for a radial ball bearing of the first invention.
  • a crown type cage for a ball bearing according to the second invention of the present invention includes a ring-shaped main portion and a plurality of axially end faces of the main portion at predetermined intervals in the circumferential direction.
  • a synthetic resin ball bearing retainer for a ball bearing made of a synthetic resin, wherein a pocket portion is provided between the elastic pieces so as to hold the rolling elements in a rollable manner.
  • the crown type cage for ball bearings includes a reinforcing plate that has a metal plate force that is higher in rigidity than the synthetic resin of the crown type cage for ball bearings.
  • the reinforcing ring is embedded substantially parallel to the axial end surface of the main part.
  • the annular disc portion is provided with at least three force points in the circumferential direction that extend in a direction opposite to the protruding direction of the inertia piece.
  • the synthetic resin of the crown-type cage for the ball bearing and the reinforcing ring are bonded with an adhesive.
  • a crown type cage for a ball bearing includes a ring-shaped main portion and a plurality of axially arranged end portions in the circumferential direction on the axial end surface of the main portion, An elastic piece projecting in a direction, and a synthetic resin ball bearing crown-shaped cage in which a pocket portion is formed between the elastic pieces to hold the rolling element in a rollable manner.
  • a reinforcing ring made of an annular metal plate having a rigidity higher than that of the synthetic resin of the crown type cage for ball bearings is fixed to the axial end surface of the main part via an adhesive. It is also possible to use a configuration that is
  • the crown type cage for ball bearings of the second invention of the present invention includes a plurality of annular main portions and a plurality of axially arranged end faces in the circumferential direction on the axial end surfaces of the main portions.
  • a crown-shaped cage for a ball bearing made of a synthetic resin, wherein a pocket portion is formed between the elastic pieces so as to hold the rolling elements in a rollable manner.
  • the main part of the crown type cage for ball bearings is embedded with a reinforcing ring made of an annular metal plate that is higher in rigidity than the synthetic resin of the crown type cage for ball bearings.
  • the synthetic resin of the crown-type cage for use and the reinforcing ring may be combined with an adhesive.
  • the adhesive preferably contains at least one of a phenol resin-based adhesive and an epoxy resin-based adhesive.
  • Such a crown type cage for a ball bearing of the second invention is manufactured by a manufacturing method including a step of insert molding by injecting a synthetic resin around an annular metal plate baked with an adhesive in a semi-cured state. be able to. Also, a manufacturing method comprising a step of insert molding by injecting a synthetic resin around an annular metal plate baked in a semi-cured state of adhesive, and a step of curing the adhesive by secondary heating. Can be manufactured.
  • the crown type cage for ball bearing of the second invention is suitable as a cage for ball bearings. It is. That is, in a ball bearing in which a plurality of balls are disposed between an outer ring and an inner ring so as to be able to roll in a circumferential direction via an annular cage, the crown type for the ball bearing of the second invention is used as the cage. It is preferable to use a cage.
  • the crown type cage of the third invention of the present invention is formed integrally with the annular main portion made of synthetic resin and one axial surface of the main portion, and spaced apart from each other in the circumferential direction.
  • a crown type comprising a plurality of pockets for freely rolling balls one by one between a pair of arranged elastic pieces, and joining a metal plate to the other axial surface of the main part with an adhesive.
  • the metal plate is made of a metal material having a linear expansion coefficient greater than that of carbon steel.
  • the adhesive is preferably at least one selected from a phenol resin-based adhesive and an epoxy resin-based adhesive.
  • Such a crown-type cage of the third invention can be manufactured by a manufacturing method including a step of insert molding by injecting a synthetic resin around a metal plate baked with an adhesive in a semi-cured state. It can also be produced by a production method comprising a step of insert molding by injecting a synthetic resin around a metal plate baked in a semi-cured state and a step of curing the adhesive by secondary heating. .
  • the rolling bearing of the fourth invention of the present invention is a rolling bearing in which a plurality of rolling elements are rotatably held via a cage between an inner ring and an outer ring. It is made of ceramics and is characterized in that the cage is a synthetic resin crown-shaped cage in which an annular reinforcing ring is embedded inside or bonded to the bottom. Furthermore, the synthetic resin crown-type cage for radial ball bearings according to the fifth aspect of the present invention has an annular main portion and one axial side surface of the main portion spaced apart from each other in the circumferential direction.
  • Synthetic resin crown type for radial ball bearings which is surrounded by a minute portion and has a plurality of pockets each with a partially spherical concave surface on the inner surface.
  • the whole is made of a metal plate and is formed in an annular shape
  • the central portion in the radial direction is a flat plate portion that is perpendicular to the axial direction
  • the portion closer to the inner diameter is the axial piece.
  • a reinforcing ring with an inner diameter side bent portion bent to the side surface and an outer diameter portion bent to the one side surface in the axial direction is embedded inside the main portion at the time of injection molding. It is characterized by things.
  • through holes may be formed in portions of the reinforcing ring that are aligned with the pockets with respect to the axial direction of the main portion.
  • the synthetic resin crown-shaped cage for radial ball bearings has an annular main portion and one axial side surface of the main portion spaced apart from each other in the circumferential direction.
  • a plurality of elastic pieces formed in a projecting direction, a pair of elastic pieces adjacent to each other in the circumferential direction, and a portion sandwiched between these two affixing pieces on one side in the axial direction of the main part
  • Synthetic resin crown type for radial ball bearings which is surrounded by a minute portion and has a plurality of pockets each with a partially spherical concave surface on the inner surface.
  • a reinforcing ring which is made of a metal plate and is formed in an annular shape as a whole and has through holes formed in portions aligned with the pockets in the axial direction of the main portion, is formed at the time of injection molding. It is good also as a structure formed by embedding inside a part.
  • a part of the reinforcing ring, a part between the pockets adjacent to each other in the circumferential direction including the base part of each elastic piece, and a main part Perforations that are long in the circumferential direction are formed in the portions that are aligned with respect to the axial direction, and a hollow portion may be formed inside the intermediate portion through the through holes.
  • Such a synthetic resin crown-shaped cage for radial ball bearings according to the fifth aspect of the present invention is suitable as a cage for radial ball bearings. That is, an outer ring having an outer ring raceway on the inner peripheral surface, an inner ring having an inner ring raceway on the outer peripheral surface, a plurality of balls that are rotatably provided between the outer ring raceway and the inner ring raceway, in a radial ball bearing provided with a cage for holding balls, it is preferable that the cage is the synthetic resin crown type cage for radial ball bearings of the fifth invention.
  • the synthetic resin cage of the sixth invention of the present invention comprises an annular base made of synthetic resin and a plurality of sets of pockets provided on one axial surface of the base,
  • the pocket is a synthetic resin cage that is formed integrally with the base portion and holds one rolling element between a pair of elastic pieces spaced apart from each other in the circumferential direction.
  • a reinforcing member molded in an annular shape made of a synthetic resin having a larger elastic coefficient than that of the synthetic resin is inserted into the base portion at the time of injection molding of the base portion and the elastic piece. It is provided for separation.
  • the reinforcing member is formed in a flat plate shape on the other axial surface of the base portion and is non-separated along the entire circumference of the base portion.
  • the content of the reinforcing fiber and the reinforcing particle is preferably the base portion and the elastic piece ⁇ the reinforcing member.
  • Such a synthetic resin cage of the sixth invention is suitable as a cage for a rolling bearing.
  • the ball bearing retainer of the seventh invention of the present invention is formed by connecting a plurality of pocket members made of grease having a circular void force and having pockets for holding the rolling elements in a freely rolling manner, A ball bearing retainer manufactured by insert molding using a reinforcing member made of metal or resin having higher elastic deformability than that of the resin as an insert, wherein the pocket member is on one end side in the axial direction.
  • the pocket bottom portion and the pocket top portion on the other end surface side in the axial direction are divided in the circumferential direction, and the divided portion of the pocket bottom portion is connected by the reinforcing member, and the pocket top portion is divided by elastic deformation of the reinforcing member.
  • the part can be opened and closed.
  • the ball bearing retainer of the seventh invention is formed by connecting a plurality of pocket members made of grease having a circular space force and having a pocket for holding the rolling element so as to roll freely.
  • the part of the reinforcing member that connects the pocket members and the part that connects the divided part of the pocket bottom are elastically deformed.
  • the divided part of the top of the pocket can be opened and closed.
  • the ball bearing retainer of the seventh invention includes a connecting means for connecting the divided portion of the pocket top portion in the closed state. Further, it is preferable that at least a part of the connecting means is constituted by the reinforcing member.
  • the ball bearing retainer of the seventh invention is a ball bearing holding holder comprising a plurality of grease pocket members formed in a circular space and having a pocket for holding a rolling element so as to roll freely.
  • the pocket member has a pocket bottom portion on one end surface in the axial direction that is elastically deformable, and a pocket top portion on the other end surface in the axial direction is divided in the circumferential direction. May be configured to be opened and closed by elastic deformation of the pocket bottom.
  • the ball bearing retainer includes a coupling means for coupling the divided portion of the top portion of the pocket in the closed state.
  • the ball bearing retainer of the seventh invention is suitable as a ball bearing retainer.
  • a ball provided with an inner ring, an outer ring, a plurality of balls arranged to roll between the inner ring and the outer ring, and a cage for holding the balls between the inner ring and the outer ring.
  • the cage is preferably the ball bearing cage of the seventh invention.
  • a rib cage retainer comprises a rib main portion and a plurality of pockets provided on one end surface in the axial direction of the ring main portion.
  • a lubricant reservoir capable of containing a lubricant is provided on the inner surface of the pocket.
  • the lubricant reservoir is preferably provided in the vicinity of the bottom of the pocket.
  • the crown-shaped cage made of resin according to the eighth invention is manufactured by insert molding using the reinforcing member as an insert, and the annular main portion and the reinforcing member are integrated. Is preferred.
  • Such a crown-shaped cage made of resin according to the eighth invention is suitable as a cage for radial ball bearings. That is, a radial ball comprising an inner ring, an outer ring, a plurality of balls arranged to roll between the inner ring and the outer ring, and a cage that holds the balls between the inner ring and the outer ring.
  • the cage is the resin-made crown cage of the eighth invention.
  • the resin-made crown-shaped cage is a ball guide type cage.
  • FIG. 1 is a partial longitudinal sectional view showing a structure of an anguilla ball bearing according to the first invention of the present invention.
  • ⁇ 2 A partial cross-sectional view showing the structure of a greaves crown-shaped cage according to the first invention of the present invention.
  • ⁇ 3 A partial cross-sectional view showing a modified example of the cocoon-made crown cage according to the first invention of the present invention.
  • FIG. 4 is a partial cross-sectional view showing another modified example of the cocoon-made crown cage according to the first invention of the present invention.
  • FIG. 5 is a partial cross-sectional view showing another modified example of the coral cage made of resin according to the first invention of the present invention.
  • FIG. 6 is a partial cross-sectional view showing another modified example of the resin-made crown cage according to the first invention of the present invention.
  • FIG. 7 is a partial cross-sectional view showing another modified example of the coral cage made of resin according to the first invention of the present invention.
  • FIG. 11 is a cross-sectional view for explaining a first embodiment of a crown type cage for ball bearings and a ball bearing according to a second invention of the present invention.
  • FIG. 12 is an enlarged perspective view of a main part showing a part in the circumferential direction of the crown type cage for the ball bearing shown in FIG.
  • FIG. 13 is an enlarged perspective view of a main part showing a part of the circumferential direction of the reinforcing ring embedded in the crown type cage for ball bearing shown in FIG.
  • FIG. 15 is a cross-sectional view of the reinforcing ring shown in FIG.
  • FIG. 16 is a cross-sectional view for explaining a second embodiment of a crown type cage for ball bearings and a ball bearing according to the second invention of the present invention.
  • FIG. 17 is an enlarged perspective view of a main part showing a part in the circumferential direction of the crown type cage for ball bearing shown in FIG. 16.
  • FIG. 18 is an enlarged perspective view of a main part showing a part of the circumferential direction of the reinforcing ring embedded in the crown type cage for the ball bearing shown in FIG.
  • FIG. 19 An enlarged perspective view of a main part for explaining a modification of the reinforcing ring shown in FIG.
  • FIG. 20 is a cross-sectional view of an essential part for explaining a third embodiment of the crown type cage for ball bearing and the ball bearing according to the second invention of the present invention.
  • FIG. 22 is a cross-sectional view of an essential part showing a first modification of the reinforcing ring fixed to the crown type cage for ball bearing shown in FIG.
  • FIG. 23 is a view showing a part of the reinforcing ring shown in FIG. 22 in the circumferential direction.
  • FIG. 24 is a cross-sectional view of an essential part showing a second modification of the reinforcing ring fixed to the crown type cage for ball bearing shown in FIG.
  • FIG. 25 is a view showing a part of the reinforcing ring shown in FIG. 24 in the circumferential direction.
  • FIG. 26 is a cross-sectional view of an essential part showing a third modification of the reinforcing ring fixed to the crown type cage for ball bearing shown in FIG.
  • FIG. 27 is a view showing a part of the reinforcing ring shown in FIG. 26 in the circumferential direction.
  • FIG. 28 is a cross-sectional view of an essential part showing a fourth modification of the reinforcing ring fixed to the crown type cage for ball bearing shown in FIG.
  • FIG. 29 is a view showing a part of the reinforcing ring shown in FIG. 28 in the circumferential direction.
  • FIG. 30 is a cross-sectional view of an essential part for explaining a fourth embodiment of a crown-type cage for ball bearings and a ball bearing according to the second invention of the present invention.
  • FIG. 31 is a view showing a part of the circumferential direction of the reinforcing ring embedded in the crown type cage for the ball bearing shown in FIG.
  • FIG. 32 is a cross-sectional view of an essential part showing a first modification of the reinforcing ring embedded in the crown type cage for ball bearing shown in FIG.
  • FIG. 33 is a view showing a part of the reinforcing ring shown in FIG. 32 in the circumferential direction.
  • FIG. 34 is a cross-sectional view of an essential part showing a second modified example of the reinforcing ring embedded in the crown type cage for the ball bearing shown in FIG.
  • FIG. 35 is a view showing a part of the reinforcing ring shown in FIG. 34 in the circumferential direction.
  • FIG. 36 is a cross-sectional view of an essential part showing a third modified example of the reinforcing ring embedded in the crown type cage for the ball bearing shown in FIG.
  • FIG. 37 is a view showing a part of the reinforcing ring shown in FIG. 36 in the circumferential direction.
  • FIG. 38 is a cross-sectional view of an essential part showing a fourth modification of the reinforcing ring embedded in the crown type cage for ball bearing shown in FIG.
  • FIG. 39 is a view showing a part of the reinforcing ring shown in FIG. 38 in the circumferential direction.
  • FIG. 40 is a cross-sectional view showing a ball bearing incorporating a conventional crown type cage for ball bearings.
  • FIG. 41 is a perspective view showing a conventional crown type cage for ball bearings.
  • ⁇ 42 A perspective view showing a part of a conventional crown-type cage for ball bearings in the circumferential direction.
  • FIG. 43 Cross-sectional view showing a ball bearing incorporating another conventional crown bearing cage for ball bearings
  • ⁇ 44 Cross-sectional view showing a ball bearing incorporating another conventional crown bearing cage for ball bearings
  • 45] is a cross-sectional view showing a ball bearing incorporating another conventional crown type cage for ball bearings.
  • ⁇ 46] is a diagram showing an example of a crown type cage of the third invention of the present invention.
  • FIG. 49 is an overall perspective view showing a crown-type cage, (b) a cross-sectional view of a main part showing a state where it is assembled in a ball bearing in accordance with FIG.
  • FIG. 47 is a view showing another example of the crown type cage of the third invention of the present invention, (a) a perspective view showing the entire crown type cage, and (b) incorporating it in a ball bearing according to FIG. 48. Sectional view showing the main part
  • FIG. 48 is a cross-sectional view showing an example of a ball bearing provided with a crown type cage.
  • FIG. 49 is an overall perspective view showing an example of a conventional crown type cage.
  • FIG. 50 is an overall perspective view showing an example of a conventional cage holder according to the present invention.
  • FIG. 51 is a partial perspective view showing an example of a synthetic resin crown-shaped cage to be incorporated in the rolling bearing of the fourth invention of the present invention.
  • FIG. 52 is a partial perspective view showing another example of the synthetic resin crown-type cage incorporated in the rolling bearing of the fourth invention of the present invention.
  • FIG. 53 is a partial perspective view showing a reinforcing ring embedded in the synthetic resin crown-shaped cage shown in FIG. 52.
  • FIG. 54 is a partially enlarged perspective view of the right end portion of FIG. 52 taken along the direction of arrow A.
  • FIG. 54 is a partially enlarged perspective view of the right end portion of FIG. 52 taken along the direction of arrow A.
  • FIG. 55 is a partially enlarged perspective view seen from the lower side of FIG. 54.
  • FIG. 56 is a partially enlarged perspective view seen from the right side of FIG. 54.
  • FIG. 57 is a cross-sectional view showing an example of a deep groove ball bearing.
  • FIG. 58 is an overall perspective view showing an example of a conventional synthetic resin crown-shaped cage.
  • FIG. 59 is a partial perspective view of a cage showing an example of an embodiment of the fifth invention of the present invention.
  • FIG. 60 is a partial perspective view of a reinforcing ring embedded in the cage.
  • FIG. 61 is a partially enlarged perspective view of the upper right end portion of FIG. [62]
  • FIG. 62 is a partially enlarged perspective view of the lower force of FIG. 61.
  • FIG. 63 is a partially enlarged perspective view seen from the right side of FIG. 61.
  • FIG. 64 is a cross-sectional view of a radial ball bearing incorporating a synthetic resin crown-type cage that is an object of the present invention.
  • FIG. 65 is a perspective view showing a first example of a synthetic resin crown-type cage that is also known in the prior art.
  • FIG. 66 is a partial perspective view showing a second example of a synthetic resin crown-type cage known conventionally.
  • FIG. 67 is a partial perspective view of the synthetic resin crown-shaped cage according to the first embodiment of the sixth invention of the present invention.
  • FIG. 68 is a partial perspective view of the synthetic resin crown-shaped cage according to the second embodiment of the sixth invention of the present invention.
  • FIG. 69 is a cross-sectional view of a rolling bearing according to a conventional example.
  • FIG. 70 is a perspective view of a synthetic resin crown-shaped cage attached to the rolling bearing shown in FIG. 69.
  • FIG. 70 is a partially exploded perspective view of a synthetic resin crown-shaped cage according to another conventional example.
  • FIG. 72 is an exploded perspective view of a synthetic resin crown-shaped cage according to still another conventional example.
  • FIG. 73 is a partially enlarged sectional view of the synthetic resin crown-shaped cage shown in FIG. 72.
  • FIG. 74 is a longitudinal sectional view showing the structure of an embodiment of a ball bearing according to the seventh invention of the present invention.
  • FIG. 75 is a perspective view of a cage incorporated in the ball bearing of FIG. 74.
  • FIG. 76 is an exploded perspective view showing the pocket member and the reinforcing member constituting the cage of FIG. 75 in an exploded manner.
  • FIG. 77 is a view showing a pocket member in which a divided portion at the top of the pocket is in an open state.
  • FIG. 78 is a diagram showing an example of connection means.
  • FIG. 79 is a perspective view of a cage for explaining a modification of the reinforcing member.
  • FIG. 80 is an exploded perspective view showing the pocket member and the reinforcing member constituting the cage of FIG. 79 in an exploded manner.
  • FIG. 81 is a longitudinal sectional view showing the structure of an embodiment of a radial ball bearing according to the eighth invention of the present invention.
  • FIG. 82 is a partial perspective view of a resin-made crown cage incorporated in the radial ball bearing of FIG. 81.
  • FIG. 83 is a partial perspective view of a greaves crown-shaped cage showing a modification of the present embodiment.
  • FIG. 84 is a partial perspective view of a greaves crown-shaped cage showing another modification of the present embodiment.
  • FIG. 1 is a partial longitudinal sectional view showing the structure of an anguilla ball bearing which is an embodiment of the first invention
  • FIG. 2 is a partial sectional view showing the structure of a resin-made crown cage.
  • the anguilla ball bearing in FIG. 1 has an inner ring 1, an outer ring 2, a plurality of balls (rolling elements) 3 arranged so as to be able to roll between the inner ring 1 and the outer ring 2, and a ball between the inner ring 1 and the outer ring 2. And a resin-made crown-shaped cage 4 for holding 3. And it is lubricated with lubricants such as grease and lubricating oil.
  • This resin crown-shaped cage 4 includes a resin-made annular main portion 10, a plurality of pockets 11 provided on one end surface in the axial direction of the annular main portion 10, and an axial direction of the annular main portion 10. And an annular reinforcing member 12 concentrically attached to the other end surface.
  • the reinforcing member 12 is along the annular main portion 10.
  • the cross-sectional shape in the plane parallel to the axial direction is a rectangle while being annular.
  • the reinforcing member 12 is embedded in a recess formed on the other axial end surface of the annular main portion 10, and is formed as one body.
  • the outer diameter surface 12a, the inner diameter surface 12b, and the pocket side surface of the reinforcing member 12 are integrated. 12c is covered with the annular main portion 10 (grease), and the surface 12d on the non-pocket side is exposed.
  • the radial distance between the outer diameter surface 10a of the annular main portion 10 and the outer diameter surface 12a of the reinforcing member 12 is F
  • the inner diameter surface 10b of the annular main portion 10 and the inner diameter surface 12b of the reinforcing member 12 E, F, and G are over zero, where G is the radial distance between and the bottom surface of the pocket 11 and E is the axial distance between the pocket-side surface 12c of the reinforcing member 12.
  • the manufacturing method of the resin-made crown cage 4 is not particularly limited, but may be manufactured by insert molding using the reinforcing member 12 as an insert.
  • the annular main portion 10 and the reinforcing member 12 are integrated at the time of insert molding.
  • the reinforcing member 12 may be fixed to the annular main portion 10 manufactured by injection molding in advance.
  • the annular main portion 10 and the reinforcing member 12 are fixed by a conventional fixing method such as bonding with an adhesive or press-fitting.
  • the crown-shaped cage holder 4 provided with such a reinforcing member 12 has high rigidity and is difficult to be deformed.
  • the reinforcing member 12 hardly comes into contact with the inner ring 1, the outer ring 2, and the ball 3 to generate heat or wear. Further, there is almost no possibility that the reinforcing member 12 is peeled off from the annular main portion 10. Therefore, the anguilla ball bearing can be used without problems at high speed.
  • the structure made of greaves can be configured as shown in FIG. That is, the concave portion is not formed on the other axial end surface of the annular main portion 10 and the reinforcing member 12 is fixed to the other axial end surface. Therefore, the outer diameter surface 12a, the inner diameter surface 12b, and the anti-pocket side surface 12d are not covered with the annular main portion 10 and are exposed.
  • the aforementioned E, F, and G are 0 or more. In the case of such a structure, it can be manufactured in the same manner as the resin-made crown-shaped cage 4 having the structure shown in FIG.
  • E, F, and G satisfy the following conditions. That is, E is not less than 0.1 XD or not less than 0.1 mm, and F and G are not less than 0.02 XC or not less than 0.1 mm.
  • C is the radial distance between the outer diameter surface 10a and the inner diameter surface 1 Ob of the annular main portion 10
  • D is the bottom surface of the pocket 11 and the non-pocket side of the reinforcing member 12 This is the axial distance from the surface 12d. If these conditions are satisfied, the contact between the reinforcing member 12 and the inner ring 1, outer ring 2, and ball 3 is less likely to occur.
  • the surface of the reinforcing member 12 is subjected to shot peening or chemical conversion treatment to form fine concaves and convexes.
  • the reinforcing member 12 is less likely to be peeled off from the annular main portion 10.
  • the surface roughness Ra of the surface of the reinforcing member 12 is preferably 0 or more, and more preferably 0.8 m or more.
  • the surface roughness Ra of the surface of the reinforcing member 12 is larger than 6.4 m, it is not preferable because there is a problem that foreign matter (dust) is likely to be attached.
  • the pocket-side surface 12c of the reinforcing member 12 may be a concave surface.
  • the concave surface may be a concave surface having a substantially U-shaped cross section as shown in FIG. 4 or a concave surface having a substantially V-shaped cross section as shown in FIG.
  • the width (radial distance) A between the inner diameter surface 12b and the outer diameter surface 12a gradually increases from the pocket side toward the opposite pocket side. It is preferable to have a tapered shape that becomes smaller (see FIG. 6). If it does so, peeling from the cyclic
  • the reinforcing member 12 may be manufactured by punching the metal plate.
  • the reinforcing member 12 is preferably arranged with the lower portion in the punching direction facing the pocket 11. In the punching process, there is a possibility that a chip may be generated, and the generated burr 14 protrudes from the end of the reinforcing member 12 along the punching direction.
  • the groove can easily come into contact with the inner ring 1, the outer ring 2, and the ball 3, but the part that the burr 14 is formed in the pocket 11 Since the groove 14 is positioned between the bottom surface of the pocket 11 and the pocket-side surface 12c of the reinforcing member 12, the groove 14 is in contact with the inner ring 1, the outer ring 2, and the ball 3. There is almost no fear. However, when the reinforcing member 12 is processed, the burrs 14 may be removed by force.
  • this embodiment shows an example of the first invention, and the first invention is It is not limited to the embodiment.
  • the force first invention described by exemplifying an angular ball bearing as a rolling bearing can be applied to various other types of radial ball bearings.
  • radial ball bearings For example, deep groove ball bearings, self-aligning ball bearings, and double row ball bearings.
  • an anguilla ball bearing and a double row ball bearing are particularly suitable.
  • the thickness B (the axial distance between the pocket-side surface 12c and the anti-pocket-side surface 12d of the reinforcing member 12) is preferably large. .
  • the surface 12d on the side opposite to the pocket of the reinforcing member 12 is not covered with the annular main portion 10 (wax).
  • the material of the reinforcing member 12 is not particularly limited as long as the rigidity of the resinous crown-shaped cage 4 can be sufficiently improved, but examples thereof include SPCC material, stainless steel, and fiber reinforced resin. It is done.
  • the hardness is preferably HvlOO or higher, more preferably Hvl20 or higher.
  • the hardness of the reinforcing member 12 is preferably lower than the hardness of a mold such as injection molding (insert molding). In particular, when molding a resin-made crown cage 4 with the reinforcing member 12 exposed as shown in FIGS. 2 to 7, if the hardness of the reinforcing member 12 is lower than the mold hardness, the mold There is little adverse effect on. Specifically, ⁇ 1200 or less is preferable
  • the type of resin constituting the cyclic main portion 10 is not particularly limited, but aliphatic polyamide resin, aromatic polyamide resin, polyether ether ketone, polyparaffin sulfide, etc. are suitable. It is.
  • the type of the adhesive that bonds the annular main portion 10 and the reinforcing member 12 is not particularly limited, but a phenol-based adhesive is suitable.
  • the surface 12d on the side opposite to the pocket which is one surface of the reinforcing member 12, is exposed.
  • the surface 12d on the side opposite to the pocket is used as one of the reference surfaces for dimensional accuracy during insert molding.
  • the concentricity between the annular main portion 10 and the reinforcing member 12 can be improved.
  • the dmn value (the product of the average value of the inner diameter and outer diameter of the bearing (in mm) and the rotation speed (in min _ 1 )) is 1 million or more or 1.1 million or more Coffin type cage with poor concentricity 4 Rotation center and reinforcement as a whole If the deviation from the rotation center of the member 12 is large, it is considered that inappropriate stress is generated in the annular main portion 10 of the resin-made crown-shaped cage 4 or abnormal vibration occurs. Further, in the present embodiment, since there is no relatively complicated bending process or complicated drilling process, it is possible to manufacture the reinforcing member 12 with good dimensional accuracy at a low cost.
  • the resin crown-shaped cage 4 shown in Fig. 2 and Figs. 4 to 7 in which the outer diameter surface 12a and the inner diameter surface 12b of the reinforcing member 12 are covered with the resin.
  • these resin-made crown cages 4 are preferable.
  • the resin-coated crown cage 4 in Fig. 3 has many exposed portions of the reinforcing member 12 and relatively good heat dissipation, so the resin-coated crown cage 4 as a whole also has excellent heat dissipation.
  • the crown-shaped cage 4 made of resin has little temperature distribution and is unlikely to deform.
  • the resin-filled crown cage 4 shown in FIGS. 2 to 7 can be formed accurately and at low cost with dimensional accuracy such as concentricity between the reinforcing member 12 and the annular main portion 10 during insert molding. It is out.
  • the second invention of the present invention is, for example, a crown type cage for ball bearings and a crown for ball bearings used in ball bearings that are operated at high speeds in a high temperature environment in various rotary machine devices such as automobiles and machine tools.
  • the present invention relates to a method of manufacturing a mold cage and a ball bearing incorporating this crown bearing cage for ball bearings.
  • a ball bearing 280 as shown in FIG. 40 is widely used as a ball bearing for supporting the rotating part of various rotating machinery devices.
  • This ball bearing 280 includes an outer ring 281 having an outer ring raceway surface 28 la on the inner peripheral surface, an inner ring 282 having an inner ring raceway surface 282a on the outer peripheral surface, and a cage 284 between the outer ring raceway surface 281a and the inner ring raceway surface 282a.
  • a plurality of balls 283 arranged so as to be able to roll in the circumferential direction via the.
  • the outer ring raceway surface 28 la and the inner ring raceway surface 282a are both deep groove type.
  • the cage 284 is a crown-type cage, and a plurality of inertia pieces 286, 286 are spaced apart from each other in the circumferential direction on one side in the axial direction of the annular main portion 285. It is formed so as to protrude in the axial direction.
  • a pocket portion 287 that holds the ball 283 in a rollable manner is formed between the inertia pieces 286 and 286 adjacent in the circumferential direction.
  • the cage 284 is formed by injection molding of synthetic resin.
  • synthetic resin for example, the use of polyamide 66, polyphenylene sulfide, etc., each containing a reinforcing material such as glass fiber, etc.Excellent heat resistance when the operating temperature exceeds 160 ° C Polyamide 46 containing a reinforcing material such as glass fiber is sometimes used.
  • a technique for preventing the deformation of the cage 284 due to centrifugal force during high-speed rotation as shown in Fig. 42, a technique in which a metal plate 288 is added to the main portion 285 has been proposed (for example, (See Japanese Patent Publication No. 145061 in 1996).
  • the main portion 285 and the metal plate 288 are firmly coupled by pouring synthetic resin into the holes 289 formed in the metal plate 288 when the main portion 285 is injection molded.
  • the metal plate 288 increases the rigidity of the main portion 285, and the elastic piece 286 is prevented from being deformed radially outward by centrifugal force.
  • FIG. 43 As another technique for preventing the deformation of the cage 284 due to the centrifugal force at the time of high-speed rotation, as shown in FIG. 43, in the main portion 285, a circle having higher rigidity than the synthetic resin of the cage 284.
  • a plate-like reinforcing ring 290 embedded therein has been proposed (see, for example, Japanese Patent Publication No. 2000/161365).
  • the reinforcing ring 290 is formed with holes 291 at a plurality of locations in the circumferential direction, and the synthetic resin existing on both sides in the axial direction of the reinforcing ring 290 is integrally coupled through the holes 291.
  • FIG. 44 shows an example in which a cylindrical reinforcing ring 292 is embedded near the outer periphery of the cage 284, and FIG. 45 shows an example in which a cylindrical reinforcing ring 292 is embedded near the inner periphery of the cage 284. It is.
  • the present invention has been made in order to eliminate such inconveniences, and the object of the present invention is to improve the rigidity of the cage, and even when operated at high speed in a high temperature environment,
  • An object of the present invention is to provide a crown type cage for ball bearings, a method for manufacturing the crown type cage for ball bearings, and a ball bearing capable of suppressing deformation due to mental force or heat and vibrational deformation due to disturbance.
  • An annular main portion and a plurality of elastic pieces arranged in the circumferential direction at predetermined intervals on the axial end surface of the main portion and projecting in the axial direction are provided between the elastic pieces.
  • Synthetic resin ball bearing crown cages that are formed with pockets that hold the moving body in a rollable manner.
  • the ball bearing crown cage cage is made of synthetic resin for ball bearing crown cage cages.
  • a reinforcing ring made of a highly rigid metal plate is embedded, and the reinforcing ring includes an annular disk portion embedded substantially parallel to the axial end surface of the main portion, and an outer peripheral edge portion or an inner peripheral edge portion of the annular disk portion. And a cylindrical portion extending in the protruding direction of the elastic piece.
  • An annular main portion and a plurality of elastic pieces arranged in the circumferential direction at predetermined intervals on the axial end surface of the main portion and projecting in the axial direction are provided.
  • a synthetic resin ball bearing crown type cage that is formed with a pocket that holds the moving body in a rollable manner.
  • the ball bearing crown type cage is designed for ball bearings on the axial end surface of the main part.
  • a crown type cage for ball bearings wherein a reinforcing ring having an annular metal plate force, which is higher in rigidity than the synthetic resin of the crown type cage, is fixed with an adhesive.
  • the crown type cage for ball bearings is embedded with a reinforcing ring made of a metal plate having higher rigidity than the synthetic resin of the crown type cage for ball bearings.
  • the reinforcing ring includes an annular disk part embedded substantially parallel to the axial end surface of the main part, and a cylindrical part extending in the protruding direction of the elastic piece from the outer peripheral edge or inner peripheral edge of the annular disk part Therefore, the rigidity of the crown-type cage for ball bearings, in particular, the bending rigidity and torsional rigidity of the main part can be improved by the reinforcing ring having a substantially L-shaped cross section.
  • the annular disk portion has a protruding portion extending in a direction opposite to the protruding direction of the elastic piece in at least three forces in the circumferential direction. Therefore, since a space can be secured between the annular disk portion and the mold surface during injection molding, the reinforcing ring can be easily embedded in the ball bearing crown type cage.
  • the crown type holder for ball bearings is provided. Since the synthetic resin and the reinforcing ring of the container are bonded with an adhesive, the bonding strength between the synthetic resin and the reinforcing ring of the crown type cage for ball bearings having different linear expansion coefficients and elasticity coefficients can be improved. As a result, the rigidity of the crown type cage for ball bearings, in particular, the bending rigidity and torsional rigidity of the main part can be improved.
  • FIG. 11 is a cross-sectional view for explaining a first embodiment of a crown-type cage for ball bearings and a ball bearing according to the present invention
  • FIG. 12 is a diagram showing a circumferential direction of the crown-type cage for ball bearings shown in FIG. 13 is an enlarged perspective view of the main part
  • FIG. 13 is an enlarged perspective view of the main part showing a part in the circumferential direction of the reinforcing ring embedded in the crown type cage for the ball bearing shown in FIG. 12
  • FIG. FIG. 15 is a cross-sectional view of the reinforcing ring shown in FIG. 14, and
  • FIG. 15 is an enlarged perspective view of a main part for explaining a modification of the reinforcing ring shown.
  • the ball bearing 210 of the present embodiment is a deep groove ball bearing in which a plurality of balls 213 as rolling elements are disposed between an outer ring 211 and an inner ring 212, and a plurality of balls 213 is held so as to be able to roll at substantially equal intervals in the circumferential direction via the ball bearing crown-shaped cage 214 of the present embodiment.
  • the crown-shaped cage 214 for ball bearings is made of synthetic resin, and has an annular main portion 221 and an axial end surface of the main portion 221 with a predetermined interval in the circumferential direction as shown in FIG.
  • a plurality of inertia pieces 222 that are arranged and project in the axial direction are formed, and a pocket portion 223 that holds a ball 213 that is a rolling element in a rollable manner is formed between the inertia pieces 222.
  • the crown type bearing for ball bearings A reinforcing ring 224 is embedded in the main part 221 of the cage 214.
  • the reinforcing ring 224 is inserted into the mold during the injection molding of synthetic resin (for example, nylon 46).
  • the reinforcing ring 224 is made of a metal plate (for example, SPCC: nominal thickness of 0.25 mm or less) having a rigidity higher than that of the synthetic resin of the crown-type cage 214 for ball bearings.
  • An annular disc portion 225 embedded substantially parallel to the axial end surface of the main portion 221 and an outer peripheral edge of the annular disc portion 225 extending in the protruding direction of the elastic piece 222, excluding each pocket portion 223 And a cylindrical portion 226 embedded in the portion.
  • the annular disk portion 225 is provided with three projections 227 extending in the circumferential direction, the inner peripheral edge portion of which also extends in the direction opposite to the protruding direction of the inertia piece 222.
  • the axial width of the cylindrical portion 226 changes along the shapes of the main portion 221 and the pocket portion 223 of the cage 220.
  • the annular disc portion 225 has a communication hole 228 for integrally connecting the synthetic resin of the crown-type cage 214 for ball bearings existing on both sides in the axial direction of the annular disc portion 225.
  • a plurality of force points are formed at predetermined intervals in the direction, and the cylindrical portion 226 is filled with the synthetic resin of the crown type cage 214 for ball bearings at the time of injection molding.
  • a plurality of force holes are formed at predetermined intervals in the circumferential direction. Then, the synthetic resin and the reinforcing ring 224 of the ball bearing crown-shaped cage 214 are integrally coupled by the communication hole 228 and the coupling hole 229.
  • a phenolic adhesive for example, METALOC (registered trademark) N-15
  • METALOC registered trademark
  • N-15 a phenolic adhesive diluted four times with methyl ethyl ketone
  • the ball bearing crown cage 214 is more rigid than the synthetic resin of the ball bearing crown cage 214.
  • Reinforcing ring 224 which also has a high metal plate force, is embedded, and reinforcing ring 224 is elastic from the annular disk part 225 embedded substantially parallel to the axial end surface of main part 221 and from the outer peripheral edge of annular disk part 225.
  • a cylindrical part 226 extending in the protruding direction of the piece 222. Therefore, the reinforcing ring 224 having a substantially L-shaped cross section can improve the rigidity of the crown-shaped cage 214 for ball bearings, particularly the bending rigidity and torsional rigidity of the main part 221.
  • the annular disk portion 225 has a protrusion 227 extending in the direction opposite to the protruding direction of the inertia piece 222 in the circumferential direction. Since there are at least three locations, it is possible to secure a space between the annular disk portion 225 and the mold surface during injection molding, so a reinforcing ring 224 is attached to the crown type cage 214 for ball bearings. It can be embedded easily.
  • the reinforcing ring 224 has a substantially L-shaped cross section, high rigidity can be secured even with a thin metal plate. It is possible to reduce the weight of the ball bearing crown type cage 214.
  • the synthetic resin of the crown bearing cage 214 for ball bearings and the reinforcing ring 224 are combined with each other by an adhesive.
  • the coupling strength between the synthetic resin and the reinforcing ring 224 of the ball bearing crown type cage 214 having a linear expansion coefficient and an elastic coefficient can be improved.
  • the rigidity of the crown-type cage 214 for ball bearings can be further improved.
  • the reinforcing ring 224 is provided with a rib 230 between an annular disk portion 225 and a cylindrical portion 226, which are bent portions of the reinforcing ring 224. You may do it. Thereby, it is possible to suppress the spring back of the annular disk portion 225 and the cylindrical portion 226, and it is possible to increase the strength of the bent portion. Further, since the synthetic resin flows into the cavity 230a on the back side of the rib 230 during injection molding, the bonding strength between the synthetic resin of the crown bearing cage 214 for the ball bearing and the reinforcing ring 224 can be further improved. (Second embodiment)
  • FIG. 16 is a cross-sectional view for explaining a second embodiment of the crown type cage and ball bearing for ball bearings according to the present invention
  • FIG. 17 shows the circumference of the crown type cage for ball bearings shown in FIG. 18 is an enlarged perspective view of the main part showing a part of the direction
  • FIG. 18 is an enlarged perspective view of the main part showing a part of the circumferential direction of the reinforcing ring embedded in the crown type cage for the ball bearing shown in FIG. 17,
  • FIG. FIG. 19 is an enlarged perspective view of a main part for explaining a modification of the reinforcing ring shown in FIG.
  • the crown type cage for ball bearing 240 of the present embodiment is provided with a recess 241 in the main portion 221 between the pocket portions 223 adjacent to each other in the circumferential direction.
  • the concave portion 241 is formed at the axial end of the main portion 221 opposite to the position where the inertia piece 222 is formed, and is substantially trapezoidal so as to have a uniform thickness with the inner peripheral surface of the pocket portion 223. It is formed into a shape.
  • the concave portion 241 has a structure in which the thickness of each part of the cage is made to be nearly equal in order to suppress deformation due to uneven thickness of the grease, and the weight of the cage can be reduced. It is provided for reasons such as
  • the crown type cage for ball bearing 240 includes a reinforcing ring 244 embedded in the lower part of the main part 221 and the pocket part 223.
  • the reinforcing ring 244 includes an annular disc portion 245 embedded substantially parallel to the axial end surface of the main portion 221 and an inertia piece from the outer peripheral edge portion of the annular disc portion 245.
  • a cylindrical portion 246 extending in the protruding direction of 222 and embedded in a lower position of the pocket portion 223.
  • the annular disk portion 245 has a radial width that changes in the circumferential direction so as to avoid the concave portion 241 of the main portion 221, and the cylindrical portion 246 has an axial width that is substantially constant in the circumferential direction.
  • the reinforcing ring 244 is provided with a rib 250 between an annular disk portion 245 that is a bent portion of the reinforcing ring 244 and a cylindrical portion 246. May be. This suppresses the spring back of the annular disk portion 245 and the cylindrical portion 246. And the strength of the bent portion can be increased.
  • synthetic resin flows into the cavity 230a on the back side of the rib 250 during injection molding (see Fig. 15)
  • the bond strength between the synthetic resin of the crown bearing cage 240 for ball bearings and the reinforcing ring 244 is further improved. be able to.
  • the annular disc portion The inner peripheral edge force of the cylindrical portion may be extended in the protruding direction of the elastic piece.
  • FIGS. a third embodiment of the crown type cage for ball bearings and the ball bearing according to the present invention will be described with reference to FIGS. Note that portions that are the same as or equivalent to those of the first embodiment are denoted by the same reference numerals in the drawings, and description thereof is omitted or simplified.
  • FIG. 20 is a cross-sectional view of a main part for explaining a third embodiment of the crown type cage and ball bearing for ball bearings according to the present invention
  • FIG. 21 is for the ball bearing shown in FIG. It is a whole perspective view of a crown type maintenance machine.
  • FIG. 22 is a cross-sectional view of a principal part showing a first modification of the reinforcing ring fixed to the crown type cage for ball bearings shown in FIG. 21, and
  • FIG. 23 shows the circumference of the reinforcing ring shown in FIG. It is a figure which shows a part of direction.
  • FIG. 24 is a cross-sectional view of the principal part showing a second modification of the reinforcing ring fixed to the crown type cage for the ball bearing shown in FIG.
  • FIG. 25 shows the circumference of the reinforcing ring shown in FIG. It is a figure which shows a part of direction.
  • FIG. 26 is a cross-sectional view of a principal part showing a third modification of the reinforcing ring fixed to the crown type cage for ball bearings shown in FIG. 21, and
  • FIG. 27 shows the circumference of the reinforcing ring shown in FIG. It is a figure which shows a part of direction.
  • FIG. 28 is a cross-sectional view of a principal part showing a fourth modification of the reinforcing ring fixed to the crown type cage for the ball bearing shown in FIG. 21, and
  • FIG. 29 shows the circumference of the reinforcing ring shown in FIG. It is a figure which shows a part of direction.
  • the crown type cage 260 for ball bearings of the present embodiment is provided on the end surface in the axial direction opposite to the formation position of the elastic piece 222 of the main portion 221, for ball bearings.
  • a reinforcing ring 261 having an annular metal plate force having a rigidity higher than that of the synthetic resin of the crown-shaped cage 260 is fixed through an adhesive.
  • the reinforcing ring 261 is not embedded in the main portion 221 of the ball bearing crown cage 260.
  • the main part 2 It is possible to increase the plate thickness of the reinforcing ring 261 compared to the case where the reinforcing ring 261 is embedded in 21. This is because when the reinforcing ring 261 is embedded in the main part 221, a space of a certain thickness or more (the thickness of the synthetic resin part in the main part 221) for the molten resin to flow during insert molding is the axial direction of the reinforcing ring 261.
  • the space is required only on one side (the side to be bonded) of the reinforcing ring 261 in the axial direction. Therefore, when compared with a ball bearing crown cage of the same size, the ball bearing crown cage 260 of the present embodiment has a space difference that is greater than that of the structure in which the reinforcement ring is embedded. By increasing the thickness, the torsional rigidity of the main portion 221 can be further improved.
  • the reinforcing ring 261 is attached to the axial end surface of the main portion 222 opposite to the position where the elastic piece 222 is formed.
  • the ball bearing crown retainer 260 has a different linear expansion coefficient and elastic modulus, so that the coupling strength between the synthetic resin 260 and the reinforcing ring 261 and the ball bearing crown retainer
  • the rigidity of 260, particularly the bending rigidity and torsional rigidity of the main part 221 can be improved.
  • both inner and outer peripheral sides of the reinforcing ring 261 are bent in the axial direction to form a bent portion 26 la.
  • the rigidity may be further improved.
  • the synthetic resin of the ball bearing crown-shaped cage 260 is wound around both inner and outer peripheral sides of the reinforcing ring 261, so that the ball bearing crown-shaped cage 260
  • the reliability of adhesive bonding between the reinforced ring and the reinforcing ring 261 can be further improved.
  • a main portion 221 between the pocket portions 223 adjacent to each other in the circumferential direction of the crown type cage for ball bearing 260 is provided. ! /,
  • This main part 2 Concave portions 241 are respectively provided at the axial ends opposite to the formation positions of the 21 elastic pieces 222, and the protrusions provided on the reinforcing ring 261 are formed on the mold for forming the concave portions 241 as shown in FIGS.
  • a plurality of holes 262 through which the portion passes may be provided at substantially equal intervals in the circumferential direction.
  • the hole 262 also functions to fix (position) the reinforcing ring 261 using a protrusion provided in the mold during insert molding.
  • the recess 241 is formed in a substantially trapezoidal shape so as to have a uniform wall thickness with respect to the inner peripheral surface of the pocket portion 223, and suppresses deformation due to unevenness of the resin wall thickness during insert molding. Therefore, it is provided for the reason that the thickness of each part of the cage is made close to each other and the weight of the cage is reduced.
  • a hole 263 into which the synthetic resin of the crown-type cage 260 for ball bearings enters the reinforcing ring 261 is provided in the circumferential direction.
  • a plurality of locations may be provided at substantially equal intervals.
  • both the inner and outer peripheral sides of the reinforcing ring 261 are bent in the axial direction to form a bent portion 261a, and the hole 262 through which the protrusion provided on the mold for forming the concave portion 241 passes through the reinforcing ring 261 in the circumferential direction.
  • the reinforcing ring 261 is provided with a plurality of holes 263 into which the synthetic resin of the ball bearing crown type cage 260 enters at substantially equal intervals in the circumferential direction.
  • FIG. 30 is a cross-sectional view of a main part for explaining a fourth embodiment of the crown type cage and ball bearing for ball bearings according to the present invention
  • FIG. 31 is for the ball bearing shown in FIG.
  • FIG. 6 is a view showing a part in the circumferential direction of a reinforcing ring embedded in a crown type cage.
  • FIG. 32 is a cross-sectional view of a principal part showing a first modification of the reinforcing ring embedded in the crown type cage for ball bearing shown in FIG.
  • FIG. 33 is a view showing a part of the reinforcing ring shown in FIG. 32 in the circumferential direction.
  • FIG. 34 is a cross-sectional view of the principal part showing a second modification of the reinforcing ring embedded in the crown type cage for ball bearing shown in FIG. 30, and FIG. 35 shows a circle of the reinforcing ring shown in FIG. It is a figure which shows a part of circumferential direction.
  • FIG. 36 is a cross-sectional view of a principal part showing a third modification of the reinforcing ring embedded in the crown type cage for ball bearings shown in FIG. 30, and
  • FIG. 37 is a circle of the reinforcing ring shown in FIG. It is a figure which shows a part of circumferential direction.
  • FIG. 36 is a cross-sectional view of a principal part showing a third modification of the reinforcing ring embedded in the crown type cage for ball bearings shown in FIG. 30, and
  • FIG. 37 is a circle of the reinforcing ring shown in FIG. It is a figure which shows a part of circumferential direction.
  • FIG. 36 is a
  • FIG. 38 is a cross-sectional view of an essential part showing a fourth modification of the reinforcing ring embedded in the crown type cage for ball bearings shown in FIG. 30, and
  • FIG. 39 is a sectional view of the reinforcing ring shown in FIG. It is a figure which shows a part of circumferential direction.
  • the crown-shaped cage 270 for ball bearings of the present embodiment has the main portion 221 between the pocket portions 223 adjacent to each other in the circumferential direction.
  • Concave portions 241 are provided at axial ends of the main portion 221 opposite to the position where the inertia piece 222 is formed.
  • the concave portion 241 is formed in a substantially trapezoidal shape so as to have a uniform thickness between the inner peripheral surface of the pocket portion 223.
  • the concave portion 241 is provided for the purpose of reducing the thickness of each cage, reducing the thickness of the cage, etc., in order to suppress deformation due to uneven thickness of the grease, during molding of the grease. It is done.
  • the crown type cage 270 for ball bearings of the present embodiment has a synthetic resin of the crown type cage 270 for ball bearings at the axial end opposite to the formation position of the inertia piece 222 of the main portion 221.
  • a reinforcing ring 271 having an annular metal plate force with higher rigidity is embedded, and the synthetic resin of the crown-type cage 270 for ball bearings and the reinforcing ring 271 are bonded together by an adhesive.
  • the reinforcing ring 271 is provided with a plurality of holes 272 through which protrusions provided in the mold for forming the recesses 241 pass at substantially equal intervals in the circumferential direction. It also functions to fix (position) the reinforcing ring 271 using the protrusion provided on the mold.
  • the reinforcing ring 271 is embedded in the main part 221 of the crown type cage for ball bearings 270.
  • This is the crown type cage for ball bearings. This is to improve the reliability of bonding between the vessel 270 and the reinforcing ring 271.
  • the phenomenon of adhesive deterioration is essentially unavoidable, but by controlling the influence of external factors such as heat, moisture, chemicals (grease, lubricating oil, etc.) and oxygen, Slowing its progress Is possible.
  • the adhesive layer formed on the surface of the reinforcing ring 271 has an external influence that causes deterioration. Therefore, it is possible to maintain a good adhesion state for a longer period.
  • the crown for ball bearings is provided at the axial end of the main portion 222 opposite to the position where the elastic piece 222 is formed.
  • a reinforcing ring 271 having an annular metal plate force which is higher in rigidity than the synthetic resin of the mold cage 270 is embedded, and the synthetic resin of the ball bearing crown-shaped cage 270 and the reinforcing ring 271 are bonded together by an adhesive.
  • both inner and outer peripheral sides of the reinforcing ring 27 1 are bent in the axial direction to form a bent portion 27 la, and the cage 270 Try to improve the rigidity further.
  • the main portion 221 is provided with a circular concave portion 241a instead of the long hole-shaped concave portion 241 and the reinforcing ring 271 is provided with Instead of the long hole 272, a circular hole 272a through which the protrusion provided on the mold for forming the recess 241a can be provided.
  • a hole 272 through which a protrusion provided on the mold for forming the recess 241 passes through the reinforcing ring 271, is circumferential.
  • a plurality of holes 273 into which the synthetic resin of the ball bearing crown-shaped cage 270 enters may be provided at substantially equal intervals in the circumferential direction.
  • both the inner and outer peripheral sides of the reinforcing ring 271 are bent in the axial direction to form a bent portion 271a, and the reinforcing ring 271 has a hole 272 through which the protrusion provided on the mold for forming the recess 241 passes.
  • a plurality of holes 273 into which the synthetic resin of the ball bearing crown-shaped cage 270 enters is provided at substantially equal intervals in the circumferential direction.
  • the crown-type cage for ball bearings of the present embodiment uses synthetic resin insert molding of a crown-type cage for ball bearings, with a reinforcing ring (metal plate) baked in a semi-cured adhesive as a core. Then, the adhesive is completely cured by secondary heating, and the reinforcing ring and the main part of the crown type cage for ball bearings are bonded and joined together.
  • the material of the reinforcing ring is not particularly limited, and examples thereof include carbon steel plates (SPCC, SECC, etc.), stainless steel plates, various steel plates, surface-treated steel plates, and the like.
  • the adhesive is not sufficiently resistant, or if it is exposed to a fragile environment during tempering, or if it is necessary to consider wrinkles for various reasons, stainless steel It is preferable to use a steel plate, a steel plate, or a surface-treated steel plate.
  • the adhesive is cured by secondary heating.
  • a synthetic ring for a ball bearing crown type cage is formed by using a reinforcing ring baked in a semi-cured state as a core. It is possible to cure the adhesive without the secondary heating only by the insert molding process.
  • the method of providing unevenness on the surface to be bonded and bonded of the reinforcing ring is not particularly limited, and examples thereof include a mechanical treatment method (blast treatment, etc.), a chemical treatment method (phosphate chemical conversion treatment, etc.), etc.
  • the f column can be displayed.
  • the adhesive is in a semi-cured state to such an extent that it is not desorbed and washed away by the molten high-pressure synthetic resin, and in addition to the heat from the molten resin, or in addition to the secondary after molding.
  • Adhesives that can be used are dilute with a solvent, and phenol-resin-based adhesives and epoxy-resin-based adhesives that progress in a two-stage curing reaction include heat resistance, chemical resistance, and handling. It is preferable in consideration of the properties.
  • the semi-cured state is achieved by, for example, applying a certain degree of curing reaction by applying heat to the adhesive applied to the reinforcing ring.
  • the thickness of the adhesive layer is preferably 1 to 40 m, more preferably 2 to 30 m. If the thickness of the adhesive is too thin, it will be difficult to stably secure a sufficient functional adhesive force. On the other hand, when the thickness of the adhesive layer is too thick, it is difficult to ensure a semi-cured state that does not flow out during insert molding and a functionally sufficient adhesive force at the same time.
  • the thickness of the adhesive layer can be obtained by adjusting the concentration of the adhesive component dispersion to be used, the coating method, and the number of coatings.
  • the application method is not particularly limited as long as it can be applied to at least the surface to be bonded and bonded of the reinforcing ring, and application force such as dating, brushing, spraying, etc. can be appropriately selected.
  • the adhesive is preferably applied to the entire surface of the reinforcing ring to be bonded in order to secure the bonding strength between the synthetic resin of the ball bearing crown type cage and the reinforcing ring.
  • a configuration may be adopted in which only a necessary portion is applied in consideration of the workability and cost of applying the adhesive.
  • the adhesive layer formed on the surface also has the effect of suppressing oxidation and corrosion of the metal plate.
  • the synthetic resin for the crown type cage for the ball bearing those which can be injection-molded and have heat resistance are preferred from the usage environment.
  • Mixtures (all of which are collectively referred to as “polyamide resin”), polyphenylene sulfide resin, polyether ether Examples include luketone resin, but polyamide resin is preferable in view of reactivity with the adhesive and cost.
  • the synthetic resin used includes a fibrous filler such as glass fiber, carbon fiber, whisker, etc., and a spherical filler such as calcium carbonate. It is preferable to add a filler.
  • the filling amount is more preferably 10 to 60% by mass, more preferably 20 to 50% by mass. If the filling amount of the filler is too small, a satisfactory reinforcing effect cannot be obtained. On the other hand, when there is too much filling amount of a filler, it is inferior to a moldability.
  • the adhesive that bonds the crown type cage for ball bearings and the reinforcing ring is a 30% by mass phenol-based resin with a solid content of novolac-type phenol resin (Toyo Chemical Research).
  • Metallok (registered trademark) N-15) manufactured in the company was further diluted appropriately with methyl ethyl ketone so that an adhesive layer having a desired thickness was obtained.
  • an adhesive was applied to the entire surface of the reinforcing ring (SECC, thickness 0.5 mm) that also had an annular metal plate force by dating, and then dried at room temperature for 30 to 60 minutes in order to evaporate the solvent. When the drying was completed, the thickness of the adhesive layer measured with an electromagnetic film thickness meter was about 6 to 10 m.
  • the reinforcing ring was left in a constant temperature bath at 120 ° C for 30 minutes until it was in a semi-cured state that would not flow out when the applied adhesive force insert was molded. Subsequently, a reinforcing ring having a semi-cured adhesive was set in a mold, and a synthetic resin was insert-molded using the reinforcing ring as a core. Then, in order to completely cure the adhesive of the molded body taken out, it was left in a thermostatic bath at 150 ° C. for 1 hour to obtain a crown type cage for ball bearings.
  • the crown-type cage for ball bearings of Example 1 has the same structure as in FIGS. 20 and 21, and the crown-type cage for ball bearings of Example 2 and Comparative Example 1 is the same as in FIGS. 28 and 29.
  • the crown type cage for ball bearings of Example 3 has the same structure as in FIGS. 30 and 31, and the crown type cage for ball bearings of Example 4 and Comparative Example 2 has the same structure as in FIGS. 38 and 39. It was.
  • Examples 1 to 4 and Comparative Examples 1 and 2 are crown type cages for deep groove ball bearings having a deviation of outer diameter X inner diameter X width of 90 mm X 50 mm X 20 mm.
  • polyamide 46 containing 25% by mass of glass fiber was used as the synthetic resin for the crown type cage for ball bearings.
  • Test results are shown in Tables 1 and 2.
  • Table 1 in Examples 1 and 2 and Comparative Example 1, the maximum rotational speed at which contact between the outer periphery of the tip of the elastic piece of the crown type cage and the inner peripheral surface of the bearing outer ring did not occur is shown in Comparative Example.
  • Relative speed is expressed as a ratio (maximum rotation speed ratio) where 1 is the rotation speed.
  • Table 2 shows the maximum rotational speed at which contact between the outer periphery of the tip of the elastic piece of the crown-type cage and the inner peripheral surface of the bearing outer ring in Examples 3 and 4 and Comparative Example 2 occurred. Assuming that the rotation speed of 2 is 1, the ratio (maximum rotation speed ratio) is expressed relatively.
  • the deep groove ball incorporating the crown type cage of Examples 1 to 4 in which the reinforcing ring and the crown type cage for ball bearings are coupled via an adhesive.
  • the bearing is operated at a higher rotational speed than the deep groove ball bearings incorporating the crown type cages of Comparative Examples 1 and 2 in which the reinforcing ring and the crown type cage for ball bearings are not bonded with an adhesive.
  • the crown-shaped cage can rotate without causing contact between the outer periphery of the tip of the elastic piece and the inner peripheral surface of the outer ring.
  • the cage main portion and the reinforcing ring having an annular metal plate force are firmly coupled by the adhesive. Therefore, even when ball bearings are used in harsh environments, deformation of the crown cage due to the centrifugal force applied during operation can be prevented, and it has been found that ball bearings incorporating this crown cage can be rotated at high speed. .
  • the third invention of the present invention relates to a crown type cage that holds a plurality of balls constituting a ball bearing in a freely rolling manner, and a method for manufacturing the same.
  • a ball bearing 301 as shown in FIG. 48 is widely used to support various rotating parts.
  • an outer ring 303 having an outer ring raceway 302 on an inner peripheral surface and an inner ring 305 having an inner ring raceway 304 on an outer peripheral surface are arranged concentrically, and between these outer ring raceway 302 and inner ring raceway 304 are arranged.
  • a plurality of rolling elements, balls 306, 306, are configured to be freely rollable by a cage 307.
  • the outer peripheral edge of the outer ring 304 is locked to the outer peripheral edge of each of the annular shield plates 320 and 320, respectively, and the shields 320 and 320 are present at the ball 306 and 306 installation portions. This prevents the grease that leaks from leaking to the outside and the dust that floats outside from entering this installation area.
  • the cage 307 is called a crown-shaped cage, and is integrally formed by injection molding a synthetic resin or a synthetic resin containing reinforcing fibers such as glass fibers and carbon fibers.
  • Polyamide 66 is generally used as a synthetic resin, but polyamide 46 with excellent heat resistance is generally used for applications exceeding the operating temperature force S160 ° C. Also, use polyphenylene sulfide resin or polyether ether ketone resin.
  • FIG. 49 shows an overall perspective view of the crown-shaped cage 307.
  • the crown-shaped cage 307 has an annular main portion 309 and an axial direction (vertical direction in the drawing) of the main portion 309 in a circumferential direction on one side (upper surface in the drawing).
  • Each of the pockets 308, 308 includes one side surface of a pair of elastic pieces 310, 310 spaced apart from each other on one axial surface of the main portion 309, and a pair of inertia pieces 310, 310 on one axial surface of the main portion 309.
  • the force is composed of spherical concave portions 311 and 311 provided between 310.
  • the inner surfaces of the concave surface portions 311 and 311 and the circumferential side surfaces of the inertia pieces 310 and 310 continuous to the concave surface portions 311 and 311 have a radius of curvature slightly larger than the radius of the raceway surface of the ball 306. It is a partially spherical concave surface having one curvature center so that the balls 306 can be held in the pockets 308 and 308 in a freely rolling manner. Each surface may be a cylindrical surface.
  • each ball 306, 306 is formed by elastically expanding the distance between the tip edges of the pair of elastic pieces 310, 310 constituting the pockets 308, 308. Push between the fertile pieces 310, 310. In this way, the crown-shaped cage 307 embeds the balls 306, 306 in the respective buckets 308, 308, thereby causing the balls 306, 306 to move to the inner ring raceway 30. 4 is held between the outer ring raceway 302 and the outer ring raceway 302.
  • the elastic pieces 310 and 310 are elastically deformed such that the tips of the elastic pieces 310 and 310 are displaced outward in the diameter direction.
  • the main portion 309 formed by only the elastic pieces 310 and 310 is also elastically deformed so as to be twisted.
  • each elastic piece 310, 310 interferes (rubs) with a part of the inner peripheral surface of the outer ring 303, and is required for relative rotation between the outer ring 303 and the inner ring 305.
  • the torque increases, and the temperature rise and abnormal noise due to the heat generated during operation become significant, and in extreme cases, it may cause failure such as seizure.
  • the rotating machine device is used under high temperature conditions such as an engine room of an automobile (for example, an auxiliary machine such as an alternator), the elastic pieces 310 and 310 are easily elastically deformed. Such inconvenience becomes significant.
  • a reinforcement that also has an annular metal plate force on the surface (bottom surface) of the main portion 309 opposite to the surface on which the pocket 308 is formed.
  • a crown type cage 307a with ring 312 joined has been developed.
  • the torsional rigidity of the main part 309 is increased by the reinforcing ring 312 to prevent the distal ends of the inertial pieces 310 and 310 from being displaced radially outward due to centrifugal force (Japanese patent) Publication No. 1996 No. 14506 1 and Japanese Patent Publication No. 2000 No. 161365).
  • the reinforcing ring 312 has circular holes 313 and 313 formed at locations corresponding to the midpoint between the pair of inertia pieces 310 and 310, and synthetic resin is insert-molded using the reinforcing ring 312 as a core. According Thus, the reinforcing ring 312 is firmly joined to the bottom surface of the main portion 309.
  • the present applicant first connects the main portion 309 and the reinforcing ring 312 with an adhesive.
  • Propose a bonded crown cage Japanese Patent Application No. 143098 2006.
  • the reinforcing ring 312 is made of metal and the main part 309 is made of synthetic resin.
  • the joint state between the main portion 309 and the reinforcing ring 312 gradually deteriorates due to the difference in the amount of expansion and contraction.
  • Reinforcement ring 312 is generally made of carbon steel such as SPCC and SECC for reasons such as cost, workability, and ease of procurement, but the linear expansion coefficient of carbon steel is 1.1 to 1. 1. small among 2 X 10 _5 K _ 1 and the metal material, deterioration of the bonding state between the main portion 309 in the high speed rotation progresses there is a concern that more is promoted.
  • the present invention has been made in view of such a situation, and in a crown-type cage 307a having a configuration in which a main portion 309 and a reinforcing ring 312 are joined, an environment in which they are repeatedly exposed to low and high temperatures.
  • the purpose is to maintain a good bonding state between the main portion 309 and the reinforcing ring 312.
  • the present invention provides a crown type cage and a manufacturing method thereof as shown below.
  • a crown-type cage that has a plurality of pockets that can be freely rolled and that is joined to the other axial surface of the main part with an adhesive.
  • the metal plate exceeds carbon steel.
  • a crown type cage having a linear expansion coefficient.
  • a method for manufacturing a crown type cage as described in (1) or (2) above comprising a step of insert molding by injecting a synthetic resin around a metal plate baked in a semi-cured adhesive.
  • a method of manufacturing a crown type cage comprising: (4) A method for manufacturing a crown-type cage as described in (1) or (2) above, comprising a step of insert molding by injecting a synthetic resin around a metal plate baked in a semi-cured adhesive. And a step of curing the adhesive by secondary heating.
  • the reinforcing ring is made of a metal material having a larger linear expansion coefficient than that of carbon steel, so that the difference in thermal expansion coefficient from the synthetic resin forming the main part is Even if it is used in an environment where it is repeatedly exposed to low and high temperatures, the main part and the reinforcing ring are well maintained in a bonded state.
  • the crown type cage of the present invention is obtained by joining a main portion made of a synthetic resin and a reinforcing ring with an adhesive.
  • the synthetic resin forming the main part is not limited, but productivity is preferably one that can be injection-molded, and more preferably one that has heat resistance.
  • productivity is preferably one that can be injection-molded, and more preferably one that has heat resistance.
  • Non-crystalline polyamide resin having a ring, or a mixture of these hereinafter, these may be collectively referred to as “polyamide resin”), polyphenylene sulfide resin, polyether ether ketone resin Fats can be used.
  • polyamide resin is preferable in consideration of reactivity with the adhesive and cost.
  • the synthetic resin can be blended with fibrous fillers such as glass fiber, carbon fiber and whisker, and granular fillers such as calcium carbonate.
  • the blending amount of the filler is preferably 20 to 50% by mass, more preferably 10 to 60% by mass. If the blending amount of the filler is less than 10% by mass, the reinforcing effect is not sufficient. If it exceeds 60% by mass, the moldability becomes inferior, and fluidity particularly suitable for injection molding cannot be obtained.
  • the reinforcing ring is a metal material having a linear expansion coefficient exceeding that of carbon steel.
  • Carbon steel has a linear expansion coefficient of 1.1 to 1.2 ⁇ 10 _5 ⁇ _1 , and is not particularly limited as long as it is a metal material having a linear expansion coefficient higher than this.
  • austenitic stainless steel of SUS304 coefficient of linear expansion: 1. 7 X 10 _5 K _1
  • aluminum alloy Spen ⁇ Tensile coefficient: 2.3 X 10 _5 K _1
  • magnesium alloy linear expansion coefficient: 2.6 ⁇ 10 _5 ⁇ _1
  • aluminum alloys and magnesium alloys are preferable because they have a linear expansion coefficient more than twice that of carbon steel.
  • the crown-shaped cage of the present invention is made from a synthetic resin that is molded by insert molding and melting a synthetic resin using a reinforcing ring in which a bonding agent is baked in a semi-cured state on the joint surface with the main part.
  • a bonding agent is baked in a semi-cured state on the joint surface with the main part.
  • the adhesive must be in a semi-cured state that does not cause the reinforcing ring force to be lost due to the high-pressure synthetic resin melted during insert molding.
  • the adhesive must be bonded to the reinforcing ring. After applying the agent, it may be heated for a predetermined time at a temperature lower than the curing temperature. Or you may heat for a short time at hardening temperature.
  • the adhesive is preferably dilutable with a solvent.
  • a suitable adhesive in the present invention is dilutable with a solvent, and further, it is not cured at normal temperature, maintains an appropriate semi-cured state, and melts during molding. It is a two-stage curable adhesive that is completely cured by heat from the resin or by secondary heating. Specific examples include phenol resin-based adhesives and epoxy resin-based adhesives. In addition, phenolic resin-based adhesives and epoxy resin-based adhesives have the advantages of being excellent in heat resistance and chemical resistance.
  • the application amount of the adhesive is 2 to 30 ⁇ m, which is preferably 1 to 40 m in a dry thickness before becoming a semi-cured state. If the amount of adhesive applied is less than 1 ⁇ m, it will be difficult to stably secure a sufficient adhesive strength in terms of function, and if it exceeds 40 m, it will have a semi-cured state that does not run off during insert molding, It becomes difficult to ensure sufficient adhesive strength at the same time.
  • the adhesive is preferably applied to the entire joining surface of the reinforcing ring. Since the reinforcing ring is made of metal, the effect of suppressing oxidation and corrosion can be obtained by applying the adhesive to the entire adhesive surface and covering it with the adhesive layer. However, if sufficient adhesive strength can be secured and maintained, adhesive In consideration of the workability and cost of application, it may be applied partially with adhesive only to the necessary part.
  • the bonding surface of the reinforcing ring is preferably processed with unevenness or roughening, and the adhesive enters the recesses or grooves, and the bonding becomes stronger due to the anchor effect.
  • the concave / convex processing and the roughening processing include mechanical methods such as blasting and chemical processing such as phosphate chemical conversion.
  • the reinforcing ring is made of a metal material having a linear expansion coefficient greater than that of carbon steel and is joined to the main part via an adhesive
  • the shape and structure of each of the main part and the reinforcing ring There are no restrictions.
  • a crown type cage 307 having a structure in which a reinforcing ring 312 having a circular hole 313 and a main portion 309 having a pocket 308 formed by a pair of inertia pieces 310 and 310 are joined. It can be.
  • FIGS. 46 and 47 can be used.
  • 46 and 47 (a) is an overall perspective view showing a crown type cage, (b) is a cross-sectional view of the main part showing a state where it is assembled in a ball bearing according to FIG. 48, and (c) is a view of a reinforcing ring. It is a top view which shows a part.
  • the annular main portion 321 has a pair of elastic pieces at a plurality of locations along the circumferential direction on one axial surface. 322 and 322 are formed, and as shown in FIG. 46 (b), a pocket is formed by a pair of inertia pieces 322 and 322 to hold the ball 313 in a rollable manner. It should be noted that the shape and dimensions of the inertia pieces 322, 322 and each part of the pocket can follow the crown-type cage 307 shown in FIG. 49, and the description thereof is omitted here.
  • the reinforcing ring 361 is an annular flat plate and is located at the position where the circular hole 313 of the reinforcing ring 312 of the crown-shaped cage 307 shown in Fig. 50 is formed, that is, between the adjacent pockets.
  • a long hole 362 is formed on the surface. This long hole 362 is for forming a void (reference numeral 341 in FIG. 46 (b)) called a “thickening recess” in the inside between adjacent pockets of the main portion 321.
  • a core projection corresponding to the shape of the lightening recess 341 is inserted into the hole 362.
  • the core protrusion is formed integrally with the mold and is inserted into the elongated hole 341 of the reinforcing ring 361, whereby the position of the reinforcing ring 361 is regulated, and the main portion 321 and the reinforcing ring 361 are accurately formed.
  • the shape of the cutout recess 341 is not shown, it is preferable that the elongated hole side also has a substantially chevron shape whose circumferential length gradually decreases toward the elastic piece side.
  • the main part 321 is the same as the crown type cage 360 shown in FIG. 46, and is formed by a pair of elastic pieces 322. It is configured to hold the ball 313 in the pocket to be rolled! (See Fig. 47 (b)).
  • the reinforcing ring 371 has a bent portion 371a formed by bending the inner and outer peripheral edges of the annular flat plate portion toward the main portion side (upward in the drawing) of the cage.
  • a long hole 372 similar to the reinforcing ring 361 shown in FIG. 46 and a circular hole 373 are formed at a midpoint between adjacent long holes 372, i.e., directly below the deepest part of the pocket. It is made.
  • the width of the flat plate portion and the bending angle of the bent portion 371a are appropriately set according to the thickness of the main portion 321 so as not to protrude from the main portion 321.
  • the crown-shaped cage 370 is manufactured by insert molding a synthetic resin with a reinforcing ring 371 as a core using a mold having a core protrusion.
  • the obtained reinforcing ring 371 is joined in a state of being embedded in the bottom of the main portion 321.
  • a hollow portion 341 is similarly formed in the main portion 321, and the circular hole 373 is located immediately below the deepest portion of the pocket, and is located in the thinnest portion in the axial direction of the main portion 321. For this reason, since the synthetic resin easily and sufficiently flows into the thinnest portion through the circular hole 373, the occurrence of defects can be prevented. Further, the bonding strength with the reinforcing ring 371 is increased by the synthetic resin flowing into the circular hole 373.
  • the crown-shaped cage 370 including the reinforcing ring 371 has a higher rigidity than the flat reinforcing ring 361 shown in FIG. 46 due to the bent portion 37 la of the reinforcing ring 371. Therefore, when the same rigidity is compared, the plate thickness of the reinforcing ring 371 can be reduced, and the small and light weight of the crown type cage 370 can be achieved. Also, since the reinforcement ring 371 is embedded, the seal and more They can be placed close together, and the entire bearing can be made compact and lightweight. Furthermore, since the reinforcing ring 371 is embedded, it does not separate from the main part 321.
  • the reinforcing ring is formed of a metal material having a larger linear expansion coefficient than that of carbon steel, the difference in thermal expansion coefficient from the synthetic resin forming the main portion is Even if it is used in an environment where it is repeatedly exposed to low and high temperatures, the joint state between the main part and the reinforcing ring is maintained well.
  • Both the examples and comparative examples are for deep groove ball bearings having an outer diameter of 90 mm, an inner diameter of 50 mm, and a width of 20 mm, and a reinforcing ring having a long hole shown in FIG. 46 and a main portion made of synthetic resin are joined via an adhesive.
  • a crown type cage was produced.
  • Example 11 SUS304 (linear expansion coefficient: 1.7 X 10 — _1 ) having a thickness of 0.5 mm was processed into a predetermined shape to produce a reinforcing ring. Then, a reinforcing ring was dubbed in an adhesive solution in which a solid content of 30% by mass of a novolak-type phenolic resin (“Metaloc N-15” manufactured by Toyo Chemical Laboratories) was diluted with methyl ethyl ketone, and the room temperature And dried for 60 minutes to evaporate the methyl ethyl ketone to form an adhesive layer having a thickness of 9 to 10 m. The thickness of the adhesive layer was measured with an electromagnetic film thickness meter.
  • a novolak-type phenolic resin (“Metaloc N-15” manufactured by Toyo Chemical Laboratories) was diluted with methyl ethyl ketone, and the room temperature And dried for 60 minutes to evaporate the methyl ethyl ketone to form an adhesive layer having a thickness
  • the reinforcing ring on which the adhesive layer was formed was left in a constant temperature bath at 120 ° C for 30 minutes to make the adhesive layer semi-cured. Then, polyamide 46 containing 25% by mass of glass fiber was insert-molded using the reinforcing ring as a core, and then taken out of the mold and left in a thermostatic bath at 150 ° C. for 60 minutes to completely cure the adhesive.
  • Example 12 an aluminum alloy (linear expansion coefficient: 2.3 X 10 " 5 K _1 ) was used as the reinforcing ring material, and in Example 13, a magnesium alloy (linear expansion coefficient: 2.6 ) was used as the reinforcing ring material.
  • ⁇ 10 _5 ⁇ _1) in Comparative example 1 SECC as stiffening ring material (linear expansion coefficient:. 1 1 ⁇ 10 _5 ⁇ _1) using a crown type cage in the same manner as in the respective examples 11 Produced.
  • Adhesion durability was evaluated for each of the produced crown cages. That is, Etak heat Attach a crown-type cage to the “WINTECH NT510” impact tester and repeatedly apply a thermal load with one cycle consisting of holding at 50 ° C for 15 minutes and then holding at 150 ° C for 15 minutes. The crown type cage was taken out every time, and the joint strength between the reinforcing ring and the main part was measured. Then, the number of cycles when the bonding strength was reduced by half from the initial bonding strength was obtained. The results are shown in Table 3 as relative values according to Comparative Example 11.
  • the crown-type cage of each example according to the present invention has much higher adhesion durability than the crown-type cage of Comparative Example 11 having a reinforcing ring that also has carbon steel strength. It is important to be superior.
  • the fourth invention of the present invention relates to a rolling bearing that constitutes a rotation support portion of various rotary machine devices such as an automobile bearing machine tool.
  • anguilla ball bearing has been frequently used for high-speed rotation applications. Since an anguilla ball bearing has a contact angle, it can support a radial load and an anguilla load in a certain direction at the same time, and can also support a load in both directions by selecting an appropriate combination. However, in an environment where the assemblability is poor and the temperature changes, the preload changes and seizure may occur.
  • FIG. 57 is a cross-sectional view showing an example of a deep groove ball bearing.
  • An outer ring 403 having an outer ring raceway 402 on the inner peripheral surface and an inner ring 4005 having an inner ring raceway 404 on the outer peripheral surface are concentrically arranged, and a ball that is a plurality of rolling elements between the outer ring raceway 402 and the inner ring raceway 404.
  • 406 and 406 are provided so as to be freely rollable by a cage 407, and are further filled with grease (not shown) for lubrication and sealed with a seal 420 !.
  • the outer ring raceway 402 and the inner ring raceway 404 are both deep groove type.
  • the cage 407 is called a crown type cage, and is obtained by injection molding synthetic resin or synthetic resin containing reinforcing fiber such as glass fiber or carbon fiber.
  • pockets 408, 408 for holding the balls 406, 406 in a rotatable manner are provided at a plurality of locations in the circumferential direction of the annular main portion 409.
  • Each of the pockets 408 and 408 includes a side surface of a pair of inertia pieces 410 and 410 disposed so as to protrude above the axial direction (vertical direction in the figure) of the main portion 409, and the main portion 409. It is composed of spherical concave surface portions 411 and 411 provided between a pair of inertia pieces 10 and 10 on the upper side in the axial direction.
  • the inner surfaces of the concave surface portions 411 and 411 are shaped so that the balls 406 and 406 can roll freely by making the radius of curvature slightly larger than the radius of curvature of the rolling surface of the balls 406.
  • the cage 407 is made of a synthetic resin or a synthetic resin containing a reinforcing fiber, when the bearing rotates at a high speed, a centrifugal force is greatly applied, and the tip of the elastic piece 410 or, in some cases, the main portion 409 Since it deforms outward in the diametrical direction, contact with the outer ring groove shoulder increases the torque and temperature significantly and may cause seizure.
  • the present applicant has first made the outer peripheral side surface of the coasting piece 410 of the cage 407 an inclined surface that is diametrically inwardly directed toward the tip. It is proposed to attach a metal reinforcing material to 407 to suppress deformation due to centrifugal force (see Japanese Patent Publication No. 161365, 2000). However, there are concerns about heat generation and wear for further high-speed rotation.
  • a metal corrugated press cage may also be used.
  • the corrugated press cage restrains the ball 406 by centrifugal force under high-speed rotation, and the ball 406 is in contact with the ball groove 406. This causes problems such as heat generation and generation of wear powder to promote grease deterioration.
  • the present invention has been made in view of such a situation, and an object thereof is to provide a rolling bearing that can sufficiently cope with use at higher speeds and is excellent in assemblability.
  • the present invention provides a rolling bearing in which a plurality of rolling elements are rotatably held between an inner ring and an outer ring via a cage, and the rolling elements are made of ceramics.
  • the present invention provides a rolling bearing characterized in that the cage is a synthetic resin crown-shaped cage in which an annular reinforcing ring is embedded inside or bonded to the bottom portion.
  • the rolling elements are made of ceramics with low wear and low calorific value, and the synthetic resin crown type cage is also reinforced with a metal reinforcing ring to increase the rigidity. Because the shape is suppressed, heat generation due to contact with the rolling element is suppressed even at high speed rotation, and wear is reduced. Also, the assemblability is good.
  • the rolling bearing of the present invention is not limited as long as the rolling element is made of ceramics and includes a synthetic resin crown-shaped cage reinforced with a reinforcing ring.
  • the rolling element is made of ceramics and includes a synthetic resin crown-shaped cage reinforced with a reinforcing ring.
  • the ball bearing 401 having the configuration shown in FIG. 406 and 406 can be made of ceramics
  • the cage 407 can be made of synthetic resin reinforced with a metal reinforcing ring.
  • the type of ceramic forming the rolling element is not particularly limited, but is nitride-based, carbide-based, alumina-based, aluminum nitride-based, boron carbide-based, titanium boride-based, boron nitride. Ceramics, titanium carbide, titanium nitride, partially stable zirconia, or composites in which two or more of these are combined are suitable.
  • an atmospheric pressure sintering method or a normal pressure sintering method is performed.
  • the ceramic powder and the sintering aid are pulverized and mixed, for example, to an average particle size of 1. O / zm or less, mixed with an appropriate solvent, and mixed to an average particle size of 100 to 150 m. Granulate.
  • the sintering aid is selected according to the type of ceramic powder. For example, for silicon nitride ceramics, as a sintering aid, metal oxides such as Al 2 O 3, MgO, CeO, Y 2 O,
  • the obtained granulated powder is filled in a mold, pressed to form a molded body, degreased, and then subjected to a sintering treatment.
  • Sintering is performed in a nitrogen gas atmosphere of less than 10 atmospheres in the atmospheric pressure sintering method, and in a nitrogen gas atmosphere of atmospheric pressure or less in the atmospheric pressure sintering method at 1450 to 1700 ° C for about 0.5 to 5 hours.
  • the resulting sintered body is then subjected to barrel polishing or the like to adjust its shape. Finish the mirror surface.
  • the resin used to form the synthetic resin crown-shaped cage such as polyamide 46, polyamide 66, polyphenylene sulfide (PPS), polytetrafluoroethylene (PTFE), Polyether ether ketone (PEEK) can be used.
  • a reinforcing fiber-containing resin composition containing about 10 to 40% by mass of reinforcing fibers such as glass fibers and carbon fibers in these resin materials is also suitable.
  • the synthetic resin crown-shaped cage is formed by bonding a ring-shaped metal reinforcing ring to the bottom surface or embedding it inside to reinforce, and deforming the main part 409 due to centrifugal force during high-speed rotation. Is preventing.
  • a material of the reinforcing ring carbon steel (SPCC), stainless steel, iron, aluminum-alum alloy and the like are suitable.
  • the reinforcing ring is used as a core to insert the above-mentioned resin material or reinforcing fiber-containing resin composition, or the reinforcing ring is bonded to the bottom surface of the main part using an appropriate adhesive V.
  • a synthetic resin crown cage with integrated ring is obtained. Specific examples of the synthetic resin crown-shaped cage reinforced with such a reinforcing ring will be illustrated below.
  • the reinforcing ring 412 is made of an annular metal plate, and has a plurality of circular holes 413 at the same pitch as the pockets 408 and 408 along the circumferential direction. , 413 are formed.
  • the reinforcing ring 412 is joined to the bottom of the main portion 409 by insert molding the synthetic resin using the reinforcing ring 412 as a core.
  • the circular hole 413 is positioned so as to be positioned in the middle of the adjacent pockets 408 and 408 and is arranged in the mold.
  • the circular holes 413 and 413 have a small diameter on the side in contact with the bottom surface of the base portion 409 (upper surface opening in the figure) and a larger diameter on the opposite side (lower surface opening in the figure). And displacement can be prevented.
  • the synthetic resin crown-shaped cage 407a and the reinforcing ring 412 are manufactured separately, and the reinforcing ring 412 is bonded to the bottom surface of the synthetic-resin crown-shaped cage 407a using an appropriate adhesive. You may do it.
  • a convex portion having the same shape as the circular hole 413 of the reinforcing ring 412 is formed on the bottom surface of the synthetic resin crown-shaped cage 407a.
  • the reinforcing ring 412a includes an annular flat plate portion 414 and a flat plate.
  • An inner diameter side bent portion 415 and an outer diameter side bent portion 416 are formed by bending both inner and outer peripheral edges of the plate portion 414 toward the main portion side (upward in the drawing) of the cage.
  • the width of the flat plate portion 414 and the bending angles of the inner diameter side bent portion 415 and the outer diameter side bent portion 416 are appropriately set according to the thickness of the main portion 409 so as not to protrude from the main portion 409.
  • long holes 417, 417 and circular holes 41, 418 extending in the circumferential direction are alternately formed with the same pitch as the pockets 408, 408 in the circumferential direction. Has been.
  • the thinned recesses 421 and 421 gradually decrease in circumferential direction length toward the long hole side force elastic one side, and the surface facing the concave portion 411 of the pockets 408 and 408 is an inclined surface. Exhibits the shape of the mold.
  • the above-mentioned synthetic resin is insert-molded with the reinforcing ring 412a as a core.
  • the reinforcing ring 412a is embedded in the bottom of the main portion 409.
  • the reinforcing ring 412a is positioned and disposed in the mold so as to be positioned in the portion 419 between the pockets 408 and 408 of the elongated holes 417 and 417 force main portion 409.
  • core protrusions corresponding to the shapes of the hollow recesses 421 and 421 are inserted into the long holes 417 and 417 of the reinforcing ring 412a.
  • the synthetic resin crown-shaped cage 407b including the reinforcing ring 412a has rigidity compared to the flat reinforcing ring 412a shown in Fig. 51 due to the two bent portions 415 and 416 of the reinforcing ring 41 2a. Increase more.
  • the plate thickness of the reinforcing ring 412a can be reduced, and the small and light weight of the rigid-resinous crown type retainer 407b can be achieved. Further, since the reinforcing ring 412a is embedded, it can be placed closer to the seal 420, and the entire rolling bearing can be made small and light. Furthermore, since the reinforcing ring 412a is embedded, it does not separate from the main portion 409.
  • a bearing space formed by, for example, an inner ring, an outer ring and rolling elements can be filled with a lubricant.
  • a lubricant Any known lubricant or grease can be used as long as it is not limited.
  • a deep groove ball bearing with a non-contact rubber seal with an inner diameter of 50 mm, an outer diameter of 90 mm, and a width of 20 mm was prepared.
  • the rolling elements and the cage were changed to produce test bearings.
  • the synthetic resin crown-type cage with a reinforcing ring used in the test bearing of Example 21 has a reinforcing ring having a bent portion and a long hole and a circular hole formed in the flat plate portion as shown in FIG. It is embedded and further formed with a hollow in the main part.
  • grease with a kinematic viscosity at 40 ° C of 20 mm 2 Zs as the base oil and a urea compound as an additive is 20% of the bearing space volume. The amount was enclosed.
  • each test bearing was continuously rotated for 2 hours under the following conditions, and the temperature rise at that time was measured.
  • the amount of iron powder mixed in the encapsulated grease due to wear during rotation was measured. The results are also shown in Table 4.
  • Example 21 using the synthetic resin crown-type cage in which the rolling element is made of ceramics and the reinforcing ring is provided and the hollow portion is formed according to the present invention, the dmn value is Even if it exceeds 1,200,000, the temperature rise will be suppressed and wear will be small.
  • a synthetic resin crown type cage and metal rolling element without a reinforcing ring as in Comparative Example 21 are used, the amount of wear increases due to large heat generation due to deformation due to insufficient rigidity of the cage.
  • a metal corrugated press cage and a metal rolling element are used as in Comparative Example 22, the heat generation is slightly increased due to the cage restraining the rolling element, and the amount of wear is the largest.
  • a fifth invention of the present invention is a radial ball bearing that constitutes a rotation support portion of various rotary machine devices such as automobile auxiliary machines and machine tools, and a synthetic resin crown type cage that constitutes this radial ball bearing.
  • improvements In particular, according to the present invention, even when the high-speed operation is performed in a high-temperature environment, by suppressing deformation of the cage, it is possible to prevent a part of the cage from rubbing against the inner peripheral surface of the outer ring, and the radial ball bearing described above. It was invented for the purpose of allowing the rotary machine device incorporating the above to operate stably.
  • a ball bearing 501 as shown in FIG. 64 is widely used as a radial ball bearing for supporting various rotating parts such as bearings of various rotating machine devices as described above.
  • this ball bearing 501 an outer ring 503 having an outer ring raceway 502 on the inner peripheral surface and an inner ring 505 having an inner ring raceway 504 on the outer peripheral surface are arranged concentrically, and a plurality of these are arranged between the outer ring raceway 502 and the inner ring raceway 504.
  • Individual balls 506, 506 are provided so as to roll freely.
  • the outer ring raceway 502 and the inner ring raceway 504 are both deep groove type.
  • the plurality of balls 506 and 506 are held in a pocket 508 provided in the holder 507 so as to be freely rollable.
  • This cage 507 is called a crown-shaped cage, and is formed integrally as a whole by injection molding a synthetic resin as shown in FIG.
  • polyamide 66 is generally used, and polyamide 46 having excellent heat resistance in the case where the operating temperature exceeds 160 ° C, each containing a reinforcing material such as glass fiber. use.
  • Polyphenylene sulfide may be used.
  • balls 506, 506 are rotatably held at a plurality of circumferential positions of the annular main portion 509. Provide pockets 508 and 508.
  • each of the pockets 508, 508 is a piece of a pair of inertial pieces 510, 510 arranged on one side in the axial direction of the main part 509 and spaced from each other.
  • Spherical concave surface portions 511, 511 provided between the side surface and the pair of inertia pieces 510, 510 on one side (upper surface in FIG. 65) on one side (upper direction in FIG. 65) of the main portion 509 Consists of.
  • each of the balls 506, 506 can be held in a freely rolling manner, and is a partially spherical concave surface having a single center of curvature.
  • each of the balls 506, 506 is elastically pushed to increase the distance between the pair of elastic pieces 510, 510 constituting the pockets 508, 508. Push between the pair of inertia pieces 510 and 510. In this way, the cage 507 holds the balls 506 and 506 in the poggets 508 and 508. Thus, the balls 506 and 506 are moved into the inner ring raceway 504 and the outer ring raceway 502 (FIG. 64). (Refer to) and hold it freely.
  • each of these elastic pieces 510 and 510 is supported in a cantilever manner on one axial surface of the annular main portion 509.
  • each of the inertial pieces 510 and 510 is a free end that can be displaced without being joined to other portions.
  • an annular reinforcing ring 512 made of a metal plate is coupled and fixed to a main portion 509 constituting a synthetic resin crown-shaped cage 507a.
  • Through holes 513 and 513 are formed in a part of the reinforcing ring 512, and the main portion 509 and the reinforcing ring 512 are connected to the through holes 513 and 513 when the cage 507a is injection-molded.
  • the synthetic resin that has entered and solidified into the inside is bound in a separable manner. Since the torsional rigidity of the main portion 509 is enhanced by the presence of the reinforcing ring 512, the distal end portions of the elastic pieces 510 and 510 are prevented from being displaced outward in the diameter direction due to centrifugal force.
  • the elastic pieces 510, 510 are restrained from being displaced radially outward during high-speed operation, and the end edges of these inertial pieces 510, 510 and It is possible to prevent the outer ring 503 from rubbing against a part of the inner peripheral surface to some extent.
  • the use of radial ball bearings has become increasingly severe due to the recent improvement in performance and miniaturization of various rotating machines such as automobile auxiliary machines and machine tools. Specifically, the installation space has been reduced, the rotational speed during use has increased, and the temperature has also increased significantly.
  • the torsional rigidity of the main portion 509 may not necessarily be sufficiently improved. Sex is out. For this reason, when operated under severe conditions as described above, the tip edge of each of the elastic pieces 510 and 510 has a diameter due to the large centrifugal force accompanying high-speed rotation and the softening of the synthetic resin accompanying the temperature rise. There is a possibility that the front end edge and a part of the inner peripheral surface of the outer ring 503 (see FIG. 64) rub against each other.
  • the present invention improves the torsional rigidity of the cage as compared with the structures described in the above-mentioned publications, and the deformation based on centrifugal force and vibration applied during operation is improved. It was invented to achieve a synthetic resin crown type cage and a radial ball bearing incorporating this cage.
  • a synthetic resin crown-shaped cage for radial ball bearings according to a fifth aspect of the present invention is manufactured by injection molding synthetic resin, and includes an annular main portion, a plurality of elastic pieces, and a composite piece. With a number of pockets.
  • each of the flange pieces is formed on the one axial side surface of the main part so as to protrude in the axial direction at a distance from each other in the circumferential direction.
  • Each of the pockets is a portion surrounded by a pair of coasting pieces adjacent to each other in the circumferential direction and a portion sandwiched between these two elastic pieces on one axial surface of the main part.
  • each inner surface is a partially spherical concave surface.
  • the reinforcing ring is embedded inside the main portion at the time of injection molding.
  • the reinforcing ring is made of a metal plate having sufficient rigidity, such as a carbon steel plate or a stainless steel plate, and is formed into an annular shape (annular shape) as a whole, and its radial center is perpendicular to the axial direction. It is a flat plate part that exists in Further, the portion closer to the inner diameter is a bent portion on the inner diameter side that is bent toward the one side surface in the axial direction. Further, the portion closer to the outer diameter is used as the outer diameter side bent portion bent toward the one side surface in the axial direction.
  • the reinforcing ring is made of a metal plate having sufficient rigidity, such as a carbon steel plate or a stainless steel plate, and is formed into an annular shape (annular shape) as a whole. It may be configured such that through holes are formed in the matching parts.
  • through holes that are long in the circumferential direction are formed in the part between the pockets adjacent to each other in the circumferential direction including the base of each elastic piece and the part that is aligned with respect to the axial direction of the main part.
  • the radial ball bearing of the fifth aspect of the present invention includes an outer ring having an outer ring raceway on an inner peripheral surface, an inner ring having an inner ring raceway on an outer peripheral surface, and a roller ring between the outer ring raceway and the inner ring raceway. It has a plurality of balls provided on its own and a cage for holding each of these balls.
  • this cage is used as a radial ball as described above.
  • the torsional rigidity of the cage can be improved as compared with the structures described in both publications.
  • a synthetic resin crown-shaped cage that resists deformation due to centrifugal force and vibration applied during operation can be realized, and a radial ball bearing incorporating this cage can be downsized and operated at high speed. .
  • the reinforcing rings embedded in the main portion made of synthetic resin are arranged on the both sides in the radial direction of the flat plate portion on the inner diameter side and outer diameter side. Form both bent parts.
  • the section modulus of a reinforcing ring with such a double-bent portion is larger than the section modulus of a flat plate-shaped reinforcing ring like the conventional structure shown in FIG.
  • the torsional rigidity is large.
  • the bending direction of both the inner diameter side and outer diameter side bent portions of the reinforcing ring coincides with the bending direction of the inner surface of each pocket. Therefore, even if the thickness of the metal plate constituting the reinforcing ring for securing the reinforcing ring is secured, a part of the reinforcing ring may be exposed to a part of the inner surface of each pocket. Or, it is not exposed to a part of the other axial side surface (side surface opposite to each of these pockets) of the main part. In other words, the reinforcing ring can be completely embedded inside the main part.
  • a portion that is aligned with respect to the axial direction of the main portion between the portion adjacent to the circumferential direction including the base portion of each coasting piece and the portion in the circumferential direction is long.
  • the shrinkage that causes such a dent causes the shape of not only the part but also the adjacent part to be distorted.
  • the inner surface of each pocket The friction between the ball and the rolling surface of the ball becomes poor.
  • the thickness of the intermediate portion is kept small to prevent the occurrence of the above-mentioned shrinkage, and the inner surface of each pocket and the ball roll. Maintains good friction with the moving surface.
  • FIGS. 59 to 63 show an example of an embodiment of the present invention.
  • the feature of the present invention is that a plurality of elastic pieces constituting the cage 507b even when the outer ring 503 constituting the ball bearing 501 and the inner ring 505 (see FIG. 64) are relatively rotated.
  • the structure is to prevent interference between the outer peripheral side surfaces of 510 and 510 and a part of the inner peripheral surface of the outer ring 503 described above. Since the configuration and operation of the other parts are the same as those of the conventional structure shown in FIGS. 64 to 66 described above, the explanation for the equivalent parts will be omitted or simplified, and the characteristic parts of the present invention will be mainly described below. Explained.
  • a carbon steel plate for example, SPCC
  • a stainless steel plate or the like, which is a reinforcing member made of a metal plate having a rigidity higher than that of the synthetic resin, is provided in the main portion 509 constituting the cage 507b.
  • a metal reinforcing ring 512a is embedded and supported all around.
  • This reinforcing ring 512a is formed in an annular shape as a whole and has a mountain shape in cross section. That is, the radial center portion of the reinforcing ring 512a is a flat plate portion 514 that exists in a direction orthogonal to the axial direction.
  • the outer diameter side bent portion 516 is an outer diameter side bent portion 516 that is bent toward the one side surface in the axial direction.
  • through holes 517, 517 and circular through holes 518, 518 which are long in the circumferential direction are alternately arranged in the circumferential direction and are the same as the pockets 508, 508, respectively It is formed with a pitch.
  • the reinforcing ring 512a as described above is embedded and supported (inserted) in the main portion 509 when the cage 507b is injection-molded. For this reason, at the time of this injection molding, the reinforcing ring 512a is set at a predetermined position in the cavity of the mold for injection molding.
  • the predetermined position is a position where the main portion 509 is to be formed in the axial direction, and in the circumferential direction, each of the through holes 517, 517 includes a circumference including the base of each of the inertia pieces 510, 510.
  • the pockets 508 and 508 adjacent to each other in the direction [3 ⁇ 4 of 519 and 519 are connected to each other 518 and 518 forces S.
  • the thickness in the axial direction of the main portion 509 at the portion aligned with each of the pockets 508 and 508 Each position is aligned with the smallest dimension. Further, at the time of injection molding, a core protrusion protruding into any one of the mold forces is inserted into the through holes 517 and 517.
  • the retainer 507b is injection-molded at the same time.
  • the reinforcing ring 512a is embedded in the main portion 509 constituting the cage 507b.
  • portions that are aligned with the through-holes 517 and 517 are formed with the hollow portions 521 and 521 (based on the core protrusions).
  • the cage 507b obtained in this way is opened after the mold is opened after the synthetic resin is cooled and solidified. As shown in Fig. 64, it is assembled in a radial ball bearing.
  • the section modulus of the reinforcing ring 512a embedded in the synthetic resin main portion 509 constituting the cage 507b of the above example is torsional rigidity that increases as the cross-sectional shape is bent. Is big. For this reason, the tip portions of the elastic pieces 510 and 510 softened as the temperature rises tend to be displaced outward in the radial direction by the centrifugal force applied during high speed operation. Even if the portion 509 tends to deform in the twisting direction, the deformation of the main portion 509 of the reinforcing ring 512a force is sufficiently suppressed. For this reason, it is possible to prevent the leading edge of each of the coasting pieces 510 and 510 from rubbing against a part of the inner peripheral surface of the outer ring 503.
  • the bending directions of both the inner diameter side and outer diameter side bent portions 515 and 516 of the reinforcing ring 512a coincide with the bending direction of the inner surfaces of the pockets 508 and 508, respectively. Therefore, if the bending angle of the bent portions 515 and 516 with respect to the flat plate portion 514 is appropriately regulated, the thickness of the metal plate constituting the reinforcing ring 512a is secured to ensure the rigidity of the reinforcing ring 512a.
  • the reinforcing ring 512a is substantially completely embedded in the main portion 509 (except for the peripheral portions of the through holes 517 and 517, which are partially exposed to insert the core protrusions).
  • the through holes 518, 518 are formed in portions of the reinforcing ring 512a that are aligned with the pockets 508, 508 with respect to the axial direction of the main portion 509. Therefore, regardless of the presence of the reinforcing ring 512a, the synthetic resin can be distributed evenly over the portion 522 of the main portion 509 having the smallest thickness in the axial direction. it can. And it can prevent effectively that defects, such as a defect
  • the synthetic resin flows between both surfaces of the reinforcing ring 512a in the portion 522. Therefore, the synthetic resin that has flowed through at least one of the both sides of the reinforcing ring 512a flows into the other through the through holes 518 and 518, and the synthetic resin can be evenly distributed to the portion 522.
  • a synthetic resin cage and a rolling device capable of reducing wear of the cage by suppressing deformation of the bearing, increase in torque, and heat generation by suppressing deformation of the cage.
  • the rolling bearing is formed by inner ring 602, outer ring 604, and between inner ring 602 and outer ring 604.
  • it is composed of a rolling element 605 interposed in the bearing, a cage 607 that holds the plurality of rolling elements 605, and a shield plate 606 that seals the lubricant in the bearing.
  • Reference numeral 601 represents an inner ring raceway
  • reference numeral 603 represents an outer ring raceway.
  • a crown-shaped cage 607 as shown in FIG. 70 is frequently used.
  • the crown-shaped cage 607 has an annular base 608 and an equal interval in the circumferential direction of the base 608.
  • the multiple pockets arranged at 609 are also at the same strength.
  • Reference numeral 610 denotes a coasting piece constituting the pocket 609, as will be described later.
  • a synthetic resin is often used for light weight, and a specific example thereof is nylon as disclosed in Japanese Patent Publication No. 2002148148. 46, Nylon 66, Nylon 9T, Porophane-Reresulphide and so on.
  • Rolling bearings using a synthetic resin crown-type cage are, for example, incorporated in the rotation support part of an alternator and may be used at high temperature and high speed (above 130 ° C, DmN ⁇ 600,000). Under such conditions of use, the cage 607 is subjected to complex forces including centrifugal force directed outward in the diameter direction.
  • the cage 607 is deformed by external stress such as centrifugal force.
  • the rotational torque of the bearing may change, or heat may be generated and rub against the outer ring 604 and the seal 606 to wear.
  • Japanese Utility Model Publication No. 1884, 1994 discloses a synthetic resin crown type protective device 607 shown in FIG.
  • the retainer 607 has a connecting ring 611 so that the end portions of the inertia pieces 610 constituting the pocket 609 can be connected to each other.
  • Japanese Utility Model Publication No. 8821, 1994 discloses a synthetic resin crown-type cage 607 shown in Figs. 72 and 73.
  • the retainer 607 has a recess 612 formed between the adjacent buckets 609 to reduce the weight, and a metal reinforcing plate 613 prevents the pocket 609 from being deformed.
  • each elastic piece 610 can be prevented from being deformed outward in the diameter direction, but the structure of the cage 607 is complicated, so the manufacturing cost is high, Assembly work is also cumbersome.
  • the shape of the reinforcing plate 613 is complicated, which leads to an increase in cost as well.
  • a metal plate is used as the reinforcing plate 613, the weight of the cage is increased.
  • the reinforcing plate 613 is locked to the base 608 only by the elasticity of the elastic claws formed on the reinforcing plate 613, the reinforcing plate 613 is easily detached from the base 608, and the reinforcing action by the reinforcing plate 613 is improved. weak!,.
  • the present invention has been made in view of the circumstances as described above, and can suppress pocket deformation and prevent wear of the cage, and can be easily manufactured and reduced in weight.
  • An object of the present invention is to provide a synthetic resin cage and a rolling bearing that can be used.
  • a synthetic resin cage according to a sixth invention of the present invention comprises a synthetic resin annular base and a plurality of sets provided on one axial surface of the base. Each pocket is formed integrally with the base, and can freely roll one rolling element between a pair of elastic pieces that are spaced apart from each other in the circumferential direction.
  • a reinforcing member molded in a ring shape made of synthetic resin having a larger elastic coefficient than the synthetic resin is inserted into the base at the time of injection molding of the base and the elastic piece.
  • it is characterized in that it is provided non-separated over the entire circumference of the base.
  • the reinforcing member is formed in a flat plate shape on the other surface in the axial direction of the base portion, and is attached non-separated over the entire circumference of the base portion.
  • the content of the reinforcing fibers and the reinforcing particles is base and elastic piece ⁇ reinforcing member.
  • the rolling bearing according to the sixth aspect of the present invention incorporates the above-mentioned synthetic resin cage.
  • the deformation of the cage can be suppressed to suppress the rotational torque fluctuation of the bearing torque, the torque increase, the heat generation, the wear of the cage can be reduced, the manufacture is easy, and the light weight can be reduced. Can be planned.
  • FIG. 67 is a partial perspective view of the synthetic resin crown-shaped cage according to the first embodiment of the present invention.
  • the cage 620 includes an annular base portion 608 made of synthetic resin and a plurality of sets of pockets 609 provided on one axial surface (the upper surface in FIG. 67) of the base portion 608.
  • Each of these pockets 609 is formed by rolling one rolling element 605 between a pair of inertia pieces 610 formed integrally with the base 608 and spaced apart from each other in the circumferential direction. It is something that you keep on your own.
  • the other surface in the axial direction of the base portion 608 (the lower surface in FIG. 67) has an elastic coefficient larger than that of the synthetic resin!
  • the molded reinforcing member 621 is inserted non-separated over the entire circumference of the base portion 608 by inserting it at the time of injection molding of the base portion 608 and the elastic piece 610.
  • nylon 46 containing 20% by mass or more of glass fiber or carbon fiber is preferably used as the base 608 and the elastic piece 610 of the cage 620.
  • nylon 66 is preferably used as the base 608 and the elastic piece 610 of the cage 620.
  • a flat plate made of high-stiffness resin (reinforcing member 621) is made of polyphenylene sulfide (PPS) containing 20% by mass or more of glass fiber or carbon fiber or appropriate heat treatment.
  • PPS polyphenylene sulfide
  • PAI Polyamideimide
  • the upper limit of the content is desirably about 40% by mass, as in the aforementioned Japanese Patent Publication No. 2002148148.
  • the strength and rigidity of the synthetic resin material is the same.
  • the content of reinforcing fibers and reinforcing particles is preferably
  • the elastic modulus is larger than that of the synthetic resin constituting the base 608, and the reinforcement is molded into an annular flat plate made of a synthetic resin material.
  • the base portion 608 is deformed in the twisting direction.
  • the above-described high-rigidity resin flat plate (reinforcing member 621) provides resistance to deformation of the base 608, and as a result, prevents deformation. Therefore, the tip of the elastic piece 610 is displaced outward in the diametrical direction, and the tip and the outer ring raceway 603 (see FIG. 69) of the outer ring 604 (see FIG. 69) are less likely to rub against each other. .
  • the thickness dimension of the base portion 608 in the axial direction can be made smaller than before.
  • the distance between the other axial surface of the portion 608 and the shield plate 606 (see FIG. 69) incorporated in the bearing can be increased.
  • the gap between the inner surface of the pocket 609 and the rolling surface of the rolling element 605 becomes somewhat large, the other surface in the axial direction and the inner surface of the shield plate 606 (see FIG. 69) rub against each other. None will happen.
  • the synthetic resin crown-shaped cage 620 can be made lightweight and highly rigid, and the synthetic resin crown-shaped cage 620 Since each part of this part rubs against the other surface, even if it is used at a high temperature and at a high speed, seizure due to the rubbing of each part occurs.
  • the distance between the other axial surface of the base portion 608 and the inner surface of the shield plate 606 can be increased, the stirring resistance of the grease existing between both surfaces can be reduced. As a result, it is possible to suppress the increase in the temperature of the grease that can only reduce the rotational torque of the bearing. In addition, the lubrication performance of the grease can be maintained by suppressing the softening of the grease.
  • the synthetic resin crown-type cage 620 of the present embodiment is configured and operates as described above, even when the bearing is rotated at high speed under high temperature, a part of the cage 620 is Rubbing with the mating surface is eliminated and stable bearing performance can be maintained over a long period of time. In other words, improved durability and reliability of bearings that incorporate a synthetic resin crown-type cage 620 that resists seizure and other failures even under severe conditions, as well as various mechanical devices that incorporate this bearing. Can be achieved.
  • FIG. 68 is a partial perspective view of a synthetic resin crown-shaped cage according to the second embodiment of the present invention.
  • the elastic modulus is larger on the other side in the axial direction of the base 8 (the lower surface in FIG. 68) than the synthetic resin constituting the base 608.
  • a reinforcing member 621 molded into an annular flat plate that also serves as a resin material is inserted during the injection molding of the base 608 and the elastic piece 610 so as to be enclosed over the entire circumference of the base 608.
  • the seventh aspect of the present invention relates to a cage made of grease that is incorporated into a ball bearing.
  • the seventh invention of the present invention relates to a ball bearing in which a cage made of resin is incorporated.
  • an object of the present invention is to solve the above-described problems of the prior art, and to provide a resin cage that does not easily deform even when used under high speed and high temperature conditions.
  • Another object of the present invention is to provide a ball bearing that can be suitably used even under high speed and high temperature conditions.
  • the ball bearing retainer according to the present invention comprises a plurality of resin pocket members each having a circular space and a pocket for holding the rolling element in a freely rolling manner.
  • a cage for ball bearings manufactured by insert molding using a reinforcing member made of metal or resin having higher elastic deformability than fat as an insert, wherein the pocket member is a pocket bottom portion on one axial end surface side.
  • the pocket top on the other end surface side in the axial direction is divided in the circumferential direction, and the divided portion of the pocket bottom is connected by the reinforcing member, and the divided portion of the pocket top can be opened and closed by elastic deformation of the reinforcing member. It is characterized by
  • the ball bearing retainer according to the present invention is formed by connecting a plurality of grease pocket members having a circular space force and having pockets for holding the rolling elements so as to roll freely.
  • a ball bearing retainer manufactured by insert molding using a reinforcing member made of a metal or resin having a higher elastic deformability than that of a resin, wherein each of the plurality of the bucket members is the reinforcing member.
  • the pocket member is connected to a part of the member, and the pocket member has a pocket bottom portion on one axial end surface side and a pocket top portion on the other axial end surface side.
  • the divided portion of the pocket bottom is connected by another part of the reinforcing member, and the portion of the reinforcing member that connects the pocket members to each other and the pocket bottom is divided.
  • the part connecting the parts is elastically deformed so that the divided part of the top of the pocket can be opened and closed.
  • Such a ball bearing retainer may be provided with connecting means for connecting the divided portions of the pocket tops in the closed state. Further, at least a part of the connecting means may be constituted by the reinforcing member.
  • the ball bearing cage according to the present invention is a ball bearing receiving cage in which a plurality of grease pocket members each having a circular space and having a pocket for freely rolling a rolling element are connected in an annular shape.
  • the pocket bottom portion on the one end surface side in the axial direction can be elastically deformed, and the top portion of the pocket on the other end surface side in the axial direction is divided in the circumferential direction, and the divided portion of the top portion of the pocket is
  • the pocket may be opened and closed by elastic deformation of the bottom of the pocket.
  • This ball bearing retainer may be provided with a connecting means for connecting the divided portion of the closed pocket top.
  • the ball bearing according to the present invention includes an inner ring, an outer ring, a plurality of balls arranged to be freely rollable between the inner ring and the outer ring, and the balls between the inner ring and the outer ring.
  • a ball bearing comprising a retainer for retaining, wherein the retainer is a ball bearing retainer as described above.
  • the ball bearing retainer of the present invention has high rigidity, it is unlikely to be deformed even when used under high speed and high temperature conditions. Further, since the ball bearing of the present invention includes a cage having high rigidity, it can be suitably used even under high speed and high temperature conditions.
  • FIG. 74 is a longitudinal sectional view showing the configuration of the ball bearing of this embodiment
  • FIG. 75 is a perspective view of a cage used in this ball bearing
  • 76 is an exploded perspective view showing the pocket member and the reinforcing member constituting the cage of FIG. 75 in an exploded manner.
  • the ball bearing of FIG. 74 includes an inner ring 701, an outer ring 702, an inner ring 701, and A plurality of balls 703 arranged on the rolling ring between the outer ring 702 and a plurality of balls 703 between the inner ring 701 and the outer ring 702 are held.
  • the bearing space surrounded by the inner ring 701, the outer ring 702, and the shield plates 705 and 705 is filled with a lubricant (for example, a grease composition) (not shown). Sealed. Then, the contact surfaces between the raceway surfaces of the inner ring 701 and the outer ring 702 and the balls 703 are lubricated by the lubricant.
  • the shield plates 705 and 705 may not be provided.
  • the retainer 704 includes a pocket member 710 made of a resin having a pocket 710a (see FIG. 76 (a)) that holds a ball 703, which is a rolling element, such that the ball 703 can roll, and the resin constituting the pocket member 710. And an annular reinforcing member 720 made of a metal or resin having elastic deformability, and the reinforcing member 720 has an uneven shape alternately arranged in the circumferential direction as shown in the figure. (See Fig. 76 (b)). Then, the reinforcing member 720 and the plurality of pocket members 710 arranged in an annular shape are integrally formed by insert molding using the reinforcing member 720 as an insert.
  • the pocket member 710 has a pocket bottom 711 formed on one axial end surface side of the cage 704 and a pocket top 712 formed on the other axial end surface side.
  • the pocket top 712 is divided in the circumferential direction. That is, the pocket member 710 also has two substantially U-shaped members arranged with the concave surfaces facing each other, and the two concave surfaces facing each other form a circular space that constitutes the pocket 710a.
  • the reinforcing member 720 is not entirely surrounded by grease (ie, is not entirely disposed inside the bucket member 710), but is partially exposed. That is, ⁇ at the connecting part of the plurality of pocket members 710 arranged in a ring (between the pocket members 710) and the split part of the pocket bottom 711 of the pocket member 710 (between two substantially U-shaped members) The reinforcing member 720 is completely exposed.
  • the reinforcing member 720 can be elastically deformed (bent) at the two exposed portions, and by this elastic deformation, the divided portion of the pocket top 712 of the pocket member 710 can be opened and closed (pocket top).
  • Figure 77 shows a diagram where the 712 split is open.
  • the present embodiment shows an example of the present invention, and the present invention is not limited to the present embodiment.
  • the reinforcing member 720 is exposed from the grease in two places, that is, the connecting portion between the pocket members 710 and the divided portion of the pocket bottom portion 711, but only the divided portion of the pocket bottom portion 711. It is possible to use an exposed structure, and elastic deformation (bending) is possible only in this part.
  • the connecting means for connecting the divided portions of the pocket top portion 712 is provided and the divided portions of the pocket top portion 712 are connected and joined together in the closed state, the rigidity of the cage 704 can be further increased. It is also possible to use ball bearings under high-speed conditions with a dmn value of 1 million or more.
  • the connecting means is not particularly limited, but for example, connecting means 714 as shown in FIG. 78 is suitable. In other words, the convex portion 715 and the concave portion 716 that can be engaged with each other are provided in the portion of the pocket top portion 712 facing the dividing portion.
  • the convex portion 715 is fitted into the concave portion 716, and the convex portion 715 and the concave portion 716 are engaged with each other by the elasticity of the grease, so that the opposing portions can be connected and integrated.
  • the shapes of the convex portions 715 and the concave portions 716 to be engaged are not limited to those shown in FIG. 78 as long as they can be connected using the elasticity of grease.
  • the connecting member may be hung over the divided portion of the pocket top portion 712, and both ends of the connecting member may be fixed to the opposite portions.
  • a part of the reinforcing member 720 May be used as a connecting means.
  • the reinforcing member 720 may have a shape as shown in FIG. That is, if the reinforcing member 720 is provided with a pocket top connecting portion 722 that extends so as to be stretched over the divided portion of the pocket top portion 712, and the pocket top connecting portion 722 presses the divided portion of the pocket top portion 712, the closed state is further improved. It is easier to maintain (see Figure 79). Furthermore, if the tip of the pocket top connection part 722 is fixed to the part of the pocket top part 712 opposite to the divided part, the connection of the divided part can be made stronger.
  • the material of the reinforcing member 720 is preferably cold rolled carbon steel such as SPCC or stainless steel, but has sufficient heat resistance and rigidity, and is more elastically deformed than the resin constituting the pocket member 710.
  • a resin composition that is not limited to metals and a resin composition containing a fibrous filler (for example, glass fiber, carbon fiber).
  • a resin composition containing a fibrous filler (for example, glass fiber, carbon fiber).
  • the cage 704 can be further reduced in weight.
  • the type of resin constituting the pocket member 710 is not particularly limited, but injection of polyamide resin (for example, polyamide 46, polyamide 66), polyphenylene sulfide (for example, L PPS), polyether ether ketone, etc. Moldable high performance engineering plastics are preferred.
  • polyamide resin for example, polyamide 46, polyamide 66
  • polyphenylene sulfide for example, L PPS
  • polyether ether ketone etc.
  • Moldable high performance engineering plastics are preferred.
  • a fibrous filler for example, glass fiber or carbon fiber
  • the cage is composed only of grease
  • the pocket member can be elastically deformed at the pocket bottom portion on the one axial end surface side of the cage, and the pocket top portion on the other axial end surface side is divided in the circumferential direction. This is the configuration. If the pocket bottom is elastically deformable due to its material and shape, the split portion of the pocket top can be opened and closed by elastic deformation of the pocket bottom.
  • the eighth aspect of the present invention relates to a crown-shaped cage made of resin and incorporated in a rolling bearing.
  • the eighth invention of the present invention also relates to a radial ball bearing in which a crown-shaped cage made of resin is incorporated.
  • an object of the present invention is to solve the problems of the prior art as described above and to provide a resin-made crown-shaped cage in which lubricant is hardly scattered even when used under high-speed rotation conditions.
  • Another object of the present invention is to provide a radial ball bearing that is unlikely to cause insufficient lubrication even when used under high-speed rotation conditions.
  • the eighth invention of the present invention has the following constitutional power. That is, the crown-shaped cage made of resin according to the present invention is a crown-shaped cage made of resin, comprising a ring-shaped main portion made of resin and a plurality of pockets provided on one end surface in the axial direction of the ring-shaped main portion.
  • a lubricant reservoir capable of accommodating a lubricant is provided on the inner surface of the pocket. It is preferable that the lubricant reservoir is provided in the vicinity of the bottom of the pocket. With such a configuration, since the lubricant is retained in the lubricant reservoir, the lubricant is less likely to scatter even when used under high-speed rotation conditions.
  • this crown-shaped cage made of resin it is preferable to attach an annular reinforcing member along the annular main portion to the other axial end surface of the annular main portion. Furthermore, it is manufactured by insert molding using the reinforcing member as an insert, and the annular main portion and the reinforcing member are preferably integrated. In such a configuration, since it is reinforced by the reinforcing member, even when used under a high-speed rotation condition, it is difficult to cause radial outward deformation due to centrifugal force.
  • the radial ball bearing of the present invention includes an inner ring, an outer ring, a plurality of balls arranged to freely roll between the inner ring and the outer ring, and the balls between the inner ring and the outer ring.
  • a radial ball bearing comprising a retainer, and the retainer is made of a resin as described above.
  • a crown-shaped cage is used. With such a configuration, even when used under high-speed rotation conditions, the lubricant is retained in the lubricant reservoir of the resin-made crown cage and the lubricant is difficult to scatter. A sufficient amount of lubricant is retained on the raceway surface, and insufficient lubrication is unlikely to occur in radial ball bearings.
  • the resinous crown-shaped cage is a ball guide type cage.
  • the lubricant is retained in the lubricant reservoir in the crown retainer of the present invention, the lubricant is difficult to scatter even when used under high-speed rotation conditions.
  • the radial ball bearing of the present invention is less likely to be insufficiently lubricated because the lubricant is retained in the lubricant reservoir of the resin-made crown cage even when used under high-speed rotation conditions, and the lubricant is difficult to scatter. .
  • FIG. 81 is a longitudinal sectional view showing the structure of the radial ball bearing
  • FIG. 82 is a partial perspective view of the resin crown-shaped cage used in this radial ball bearing.
  • the radial ball bearing shown in FIG. 81 includes an inner ring 801, an outer ring 802, a plurality of balls 803 that are rotatably arranged between the inner ring 801 and the outer ring 802, and a plurality of balls 80 3 between the inner ring 801 and the outer ring 802.
  • a cocoon crown-shaped cage 804 and shield plates 805 and 805 are provided.
  • the bearing space surrounded by the inner ring 801, the outer ring 802, and the shield plates 805, 805 is filled with a grease composition (lubricant) (not shown). It is sealed inside.
  • the grease composition lubricates the contact surfaces between the raceway surfaces of the inner ring 801 and the outer ring 802 and the balls 803.
  • the crown-shaped cage 804 is provided with an annular main portion 811 and a plurality of pockets 812 provided on one end surface in the axial direction of the annular main portion 811, and each pocket 812 has an annular main portion 811. And a pair of inertia pieces 812b and 812b disposed opposite to each other at the edge of the recess 812a.
  • the surfaces of the pair of inertia pieces 812b and 812b facing each other and the inner surface of the recess 812a continuously form one spherical concave surface or cylindrical surface.
  • Such a resinous crown-shaped cage 84 pushes the pair of elastic pieces 812b, 812b between the elastic pieces 812b, 812b while elastically pushing the gap between the elastic pieces 812b, 812b.
  • the ball 803 can be held in each pocket 8 12 so as to roll freely.
  • a lubricant reservoir 814 made of a recess is formed, and a grease composition can be accommodated therein. Therefore, even if a radial ball bearing is used under high-speed rotation conditions, the lubricant composition 814 retains the drier composition and is difficult to disperse, so that a sufficient amount of grease composition can be applied to the surface of the ball 803, the inner ring 801, and the outer ring. The 802 raceway surface is held, and the radial ball bearing is less prone to lubrication.
  • the shape of the lubricant reservoir 814 is not particularly limited, and may be a hemispherical shape as shown in Fig. 82, or may be a groove shape extending in the circumferential direction as shown in Fig. 83. Also, as shown in FIG. 84, a part or all of the radially inner wall surface may be removed from the wall surface forming the recess that is the lubricant reservoir 814. In the structure as shown in FIG. 84, the grease composition is supplied to the lubricant reservoir 814 from the radially inner side.
  • a reinforcing member for improving the rigidity may be attached to the crown-shaped cage 804 made of resin.
  • the annular reinforcing member 816 along the annular main portion 811 is removed from the other axial end surface of the annular main portion 811 (the end surface opposite to the end surface where the pocket 812 is provided).
  • This will increase the rigidity of the greaves crown cage 804, so even if radial ball bearings are used under high-speed rotation conditions with a dm n value of 800,000 or more, the rosin crown shape will be retained by the centrifugal force of rotation.
  • the vessel 804 is hardly deformed radially outward. Therefore, stable high-speed rotation is possible.
  • the material of the reinforcing member 816 is preferably a metal such as SPCC.
  • the resin is not limited to metal, and a resin composition containing a fibrous filler (eg glass fiber, carbon fiber) can also be used. . When such a resin composition is used, a lighter weight of the resin crown-shaped cage 804 is possible.
  • the method of fixing the reinforcing member 816 to the resinous crown-shaped cage 804 is not particularly limited, but the resinous crown-shaped cage 804 is manufactured by insert molding using the reinforcing member 816 as an insert.
  • the resinous crown-shaped cage 804 is manufactured by insert molding using the reinforcing member 816 as an insert.
  • the radial ball bearing can be used under high-speed rotation conditions with a dmn value of 1 million or more.
  • the guide method of the greaves crown-shaped cage 804 is not particularly limited, and may be a ball guide method or a raceway guide method.
  • the inner surface and outer diameter surface of the resin crown-shaped cage 804 slide with the bearing ring, which may cause wear of the resin-coated crown cage 804 and the bearing ring.
  • There is a risk of torque fluctuation in the bearing In particular, when the resin crown-shaped cage 804 is provided with a metal reinforcing member 816, the tendency is increased. Therefore, a ball guide system is preferable as the in-house system of the greaves crown-shaped cage 804.
  • the material of the crown-shaped cage 804 made of resin is not particularly limited, but polyamide resin (for example, polyamide 46, polyamide 66), polyphenylene sulfide (for example, L-PPS), polyether ether High-performance engineering plastics such as ketones that can be injection molded are preferred.
  • polyamide resin for example, polyamide 46, polyamide 66
  • polyphenylene sulfide for example, L-PPS
  • polyether ether High-performance engineering plastics such as ketones that can be injection molded are preferred.
  • a fibrous filler for example, glass fiber or carbon fiber
  • the cage made of resin according to the present invention is less likely to be deformed, heated or worn even when used at a high speed.
  • the rolling bearing of the present invention is less likely to generate heat and wear even when used at high speed.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
PCT/JP2006/323133 2005-11-18 2006-11-20 樹脂製保持器及び転がり軸受 WO2007058351A1 (ja)

Priority Applications (4)

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CN2006800418853A CN101305193B (zh) 2005-11-18 2006-11-20 树脂制保持器和滚动轴承
JP2007545334A JP4766051B2 (ja) 2005-11-18 2006-11-20 樹脂製保持器及び転がり軸受
EP06832983A EP1953400A4 (de) 2005-11-18 2006-11-20 Harzbehälter und wälzlager
US12/094,101 US8303192B2 (en) 2005-11-18 2006-11-20 Resin cage and rolling bearing

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JP2005-334058 2005-11-18
JP2005334058 2005-11-18
JP2006-126785 2006-04-28
JP2006126785 2006-04-28
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JP2006-143098 2006-05-23
JP2006160071 2006-06-08
JP2006-160071 2006-06-08
JP2006166552 2006-06-15
JP2006-166552 2006-06-15
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JP2020169665A (ja) * 2019-04-02 2020-10-15 Ntn株式会社 転がり軸受
JP7270446B2 (ja) 2019-04-02 2023-05-10 Ntn株式会社 転がり軸受
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US20090220181A1 (en) 2009-09-03
CN101305193B (zh) 2011-07-20
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EP1953400A1 (de) 2008-08-06
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